diff --git a/.changeset/chilly-ladybugs-collect.md b/.changeset/chilly-ladybugs-collect.md
new file mode 100644
index 00000000..6e66732d
--- /dev/null
+++ b/.changeset/chilly-ladybugs-collect.md
@@ -0,0 +1,5 @@
+---
+"docs": minor
+---
+
+docs(@nf-team/core): 의미가 모호한 core 함수명 변경으로 인한 문서 업데이트
diff --git a/.changeset/thirty-elephants-scream.md b/.changeset/thirty-elephants-scream.md
new file mode 100644
index 00000000..69c5e5bd
--- /dev/null
+++ b/.changeset/thirty-elephants-scream.md
@@ -0,0 +1,5 @@
+---
+"@nf-team/core": major
+---
+
+refactor(@nf-team/core): 의미가 모호한 core 유틸 함수명 변경
diff --git a/.yarn/cache/@esbuild-darwin-arm64-npm-0.21.5-62349c1520-10.zip b/.yarn/cache/@esbuild-darwin-arm64-npm-0.21.5-62349c1520-10.zip
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similarity index 59%
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rename to .yarn/cache/@swc-core-darwin-arm64-npm-1.3.96-6c495b7164-10.zip
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diff --git a/.yarn/cache/@swc-core-linux-x64-gnu-npm-1.3.96-01459a118a-10.zip b/.yarn/cache/@swc-core-linux-x64-gnu-npm-1.3.96-01459a118a-10.zip
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similarity index 51%
rename from .yarn/cache/turbo-darwin-64-npm-2.0.5-50580a1137-10.zip
rename to .yarn/cache/turbo-darwin-arm64-npm-2.0.5-b6d4e32b48-10.zip
index c8f275ff..fe721a54 100644
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diff --git a/.yarn/cache/turbo-linux-64-npm-2.0.5-7da303db48-10.zip b/.yarn/cache/turbo-linux-64-npm-2.0.5-7da303db48-10.zip
deleted file mode 100644
index 9d7e02f8..00000000
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diff --git a/apps/docs/docs/core/functions/checkEmpty.md b/apps/docs/docs/core/functions/checkEmpty.md
deleted file mode 100644
index cc6332a7..00000000
--- a/apps/docs/docs/core/functions/checkEmpty.md
+++ /dev/null
@@ -1,19 +0,0 @@
-# Function: checkEmpty()
-
-> **checkEmpty**\<`T`\>(`value`?): `T`[]
-
-## Type Parameters
-
-• **T**
-
-## Parameters
-
-• **value?**: `T`[]
-
-## Returns
-
-`T`[]
-
-## Defined in
-
-[utils.ts:44](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L44)
diff --git a/apps/docs/docs/core/functions/checkNumber.md b/apps/docs/docs/core/functions/checkNumber.md
deleted file mode 100644
index 681459c7..00000000
--- a/apps/docs/docs/core/functions/checkNumber.md
+++ /dev/null
@@ -1,15 +0,0 @@
-# Function: checkNumber()
-
-> **checkNumber**(`value`?): `number`
-
-## Parameters
-
-• **value?**: `null` \| `number`
-
-## Returns
-
-`number`
-
-## Defined in
-
-[utils.ts:26](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L26)
diff --git a/apps/docs/docs/core/functions/createNumberArray.md b/apps/docs/docs/core/functions/createNumberArray.md
new file mode 100644
index 00000000..a3cc918d
--- /dev/null
+++ b/apps/docs/docs/core/functions/createNumberArray.md
@@ -0,0 +1,15 @@
+# Function: createNumberArray()
+
+> **createNumberArray**(`length`): `number`[]
+
+## Parameters
+
+• **length**: `number`
+
+## Returns
+
+`number`[]
+
+## Defined in
+
+[utils.ts:61](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L61)
diff --git a/apps/docs/docs/core/functions/emptyAThenB.md b/apps/docs/docs/core/functions/emptyAThenB.md
index d6e7c732..0945f2ab 100644
--- a/apps/docs/docs/core/functions/emptyAThenB.md
+++ b/apps/docs/docs/core/functions/emptyAThenB.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[utils.ts:34](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L34)
+[utils.ts:31](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L31)
diff --git a/apps/docs/docs/core/functions/ensureArray.md b/apps/docs/docs/core/functions/ensureArray.md
new file mode 100644
index 00000000..0dcf76c6
--- /dev/null
+++ b/apps/docs/docs/core/functions/ensureArray.md
@@ -0,0 +1,19 @@
+# Function: ensureArray()
+
+> **ensureArray**\<`T`\>(`value`?): `T`[]
+
+## Type Parameters
+
+• **T**
+
+## Parameters
+
+• **value?**: `T`[]
+
+## Returns
+
+`T`[]
+
+## Defined in
+
+[utils.ts:41](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L41)
diff --git a/apps/docs/docs/core/functions/generateArrayOfNumber.md b/apps/docs/docs/core/functions/generateArrayOfNumber.md
deleted file mode 100644
index ccfd8bef..00000000
--- a/apps/docs/docs/core/functions/generateArrayOfNumber.md
+++ /dev/null
@@ -1,15 +0,0 @@
-# Function: generateArrayOfNumber()
-
-> **generateArrayOfNumber**(`length`): `number`[]
-
-## Parameters
-
-• **length**: `number`
-
-## Returns
-
-`number`[]
-
-## Defined in
-
-[utils.ts:64](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L64)
diff --git a/apps/docs/docs/core/functions/getNumberOrDefault.md b/apps/docs/docs/core/functions/getNumberOrDefault.md
new file mode 100644
index 00000000..9e3380b5
--- /dev/null
+++ b/apps/docs/docs/core/functions/getNumberOrDefault.md
@@ -0,0 +1,17 @@
+# Function: getNumberOrDefault()
+
+> **getNumberOrDefault**(`value`?, `defaultValue`?): `number`
+
+## Parameters
+
+• **value?**: `null` \| `number`
+
+• **defaultValue?**: `number` = `0`
+
+## Returns
+
+`number`
+
+## Defined in
+
+[utils.ts:26](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L26)
diff --git a/apps/docs/docs/core/functions/removeNullable.md b/apps/docs/docs/core/functions/getStringOrDefault.md
similarity index 81%
rename from apps/docs/docs/core/functions/removeNullable.md
rename to apps/docs/docs/core/functions/getStringOrDefault.md
index bf18bb14..cde4c661 100644
--- a/apps/docs/docs/core/functions/removeNullable.md
+++ b/apps/docs/docs/core/functions/getStringOrDefault.md
@@ -1,6 +1,6 @@
-# Function: removeNullable()
+# Function: getStringOrDefault()
 
-> **removeNullable**(`value`?, `replacementValue`?): `string`
+> **getStringOrDefault**(`value`?, `replacementValue`?): `string`
 
 ## Parameters
 
@@ -33,4 +33,4 @@ console.log(result); // 'newValue';
 
 ## Defined in
 
-[utils.ts:14](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L14)
+[utils.ts:14](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L14)
diff --git a/apps/docs/docs/core/functions/isEmpty.md b/apps/docs/docs/core/functions/isEmpty.md
index 31e39b3d..7306e5d3 100644
--- a/apps/docs/docs/core/functions/isEmpty.md
+++ b/apps/docs/docs/core/functions/isEmpty.md
@@ -16,4 +16,4 @@
 
 ## Defined in
 
-[utils.ts:52](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L52)
+[utils.ts:49](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L49)
diff --git a/apps/docs/docs/core/functions/trueOrFalse.md b/apps/docs/docs/core/functions/trueOrFalse.md
index d37b0686..83c81d16 100644
--- a/apps/docs/docs/core/functions/trueOrFalse.md
+++ b/apps/docs/docs/core/functions/trueOrFalse.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[utils.ts:36](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/core/src/utils.ts#L36)
+[utils.ts:33](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/core/src/utils.ts#L33)
diff --git a/apps/docs/docs/core/packages.md b/apps/docs/docs/core/packages.md
index 80dc02ae..e5d8dee9 100644
--- a/apps/docs/docs/core/packages.md
+++ b/apps/docs/docs/core/packages.md
@@ -2,10 +2,10 @@
 
 ## Functions
 
-- [checkEmpty](functions/checkEmpty.md)
-- [checkNumber](functions/checkNumber.md)
+- [createNumberArray](functions/createNumberArray.md)
 - [emptyAThenB](functions/emptyAThenB.md)
-- [generateArrayOfNumber](functions/generateArrayOfNumber.md)
+- [ensureArray](functions/ensureArray.md)
+- [getNumberOrDefault](functions/getNumberOrDefault.md)
+- [getStringOrDefault](functions/getStringOrDefault.md)
 - [isEmpty](functions/isEmpty.md)
-- [removeNullable](functions/removeNullable.md)
 - [trueOrFalse](functions/trueOrFalse.md)
diff --git a/apps/docs/docs/core/typedoc-sidebar.cjs b/apps/docs/docs/core/typedoc-sidebar.cjs
index 503a63e0..97039102 100644
--- a/apps/docs/docs/core/typedoc-sidebar.cjs
+++ b/apps/docs/docs/core/typedoc-sidebar.cjs
@@ -1,4 +1,4 @@
 // @ts-check
 /** @type {import('@docusaurus/plugin-content-docs').SidebarsConfig} */
-const typedocSidebar = { items: [{"type":"category","label":"Functions","items":[{"type":"doc","id":"core/functions/checkEmpty","label":"checkEmpty"},{"type":"doc","id":"core/functions/checkNumber","label":"checkNumber"},{"type":"doc","id":"core/functions/emptyAThenB","label":"emptyAThenB"},{"type":"doc","id":"core/functions/generateArrayOfNumber","label":"generateArrayOfNumber"},{"type":"doc","id":"core/functions/isEmpty","label":"isEmpty"},{"type":"doc","id":"core/functions/removeNullable","label":"removeNullable"},{"type":"doc","id":"core/functions/trueOrFalse","label":"trueOrFalse"}]}]};
+const typedocSidebar = { items: [{"type":"category","label":"Functions","items":[{"type":"doc","id":"core/functions/createNumberArray","label":"createNumberArray"},{"type":"doc","id":"core/functions/emptyAThenB","label":"emptyAThenB"},{"type":"doc","id":"core/functions/ensureArray","label":"ensureArray"},{"type":"doc","id":"core/functions/getNumberOrDefault","label":"getNumberOrDefault"},{"type":"doc","id":"core/functions/getStringOrDefault","label":"getStringOrDefault"},{"type":"doc","id":"core/functions/isEmpty","label":"isEmpty"},{"type":"doc","id":"core/functions/trueOrFalse","label":"trueOrFalse"}]}]};
 module.exports = typedocSidebar.items;
\ No newline at end of file
diff --git a/apps/docs/docs/fetch/classes/FetchError.md b/apps/docs/docs/fetch/classes/FetchError.md
index c57c124a..1f7ba60e 100644
--- a/apps/docs/docs/fetch/classes/FetchError.md
+++ b/apps/docs/docs/fetch/classes/FetchError.md
@@ -26,7 +26,7 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L6)
+[packages/fetch/src/fetch.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L6)
 
 ## Properties
 
@@ -78,7 +78,7 @@ node\_modules/typescript/lib/lib.es5.d.ts:1069
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L6)
+[packages/fetch/src/fetch.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L6)
 
 ***
 
diff --git a/apps/docs/docs/fetch/functions/fetchApi.md b/apps/docs/docs/fetch/functions/fetchApi.md
index 674e7c09..81a056d1 100644
--- a/apps/docs/docs/fetch/functions/fetchApi.md
+++ b/apps/docs/docs/fetch/functions/fetchApi.md
@@ -1,6 +1,6 @@
 # Function: fetchApi()
 
-> **fetchApi**\<`T`, `K`\>(`__namedParameters`): `Promise`\<`T`\>
+> **fetchApi**\<`T`, `K`, `B`\>(`__namedParameters`): `Promise`\<`T`\>
 
 ## Type Parameters
 
@@ -8,9 +8,11 @@
 
 • **K** = `unknown`
 
+• **B** = `unknown`
+
 ## Parameters
 
-• **\_\_namedParameters**: [`FetchApiRequest`](../interfaces/FetchApiRequest.md)\<`K`\>
+• **\_\_namedParameters**: [`FetchApiRequest`](../interfaces/FetchApiRequest.md)\<`K`, `B`\>
 
 ## Returns
 
@@ -18,4 +20,4 @@
 
 ## Defined in
 
-[packages/fetch/src/fetch.ts:28](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L28)
+[packages/fetch/src/fetch.ts:32](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L32)
diff --git a/apps/docs/docs/fetch/functions/paramsSerializer.md b/apps/docs/docs/fetch/functions/paramsSerializer.md
index eefcafc9..380b1cfc 100644
--- a/apps/docs/docs/fetch/functions/paramsSerializer.md
+++ b/apps/docs/docs/fetch/functions/paramsSerializer.md
@@ -16,4 +16,4 @@
 
 ## Defined in
 
-[packages/fetch/src/fetch.ts:23](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L23)
+[packages/fetch/src/fetch.ts:23](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L23)
diff --git a/apps/docs/docs/fetch/interfaces/FetchApiRequest.md b/apps/docs/docs/fetch/interfaces/FetchApiRequest.md
index 7ae0ac23..3af22771 100644
--- a/apps/docs/docs/fetch/interfaces/FetchApiRequest.md
+++ b/apps/docs/docs/fetch/interfaces/FetchApiRequest.md
@@ -1,18 +1,20 @@
-# Interface: FetchApiRequest\<K\>
+# Interface: FetchApiRequest\<K, B\>
 
 ## Type Parameters
 
 • **K** = `unknown`
 
+• **B** = `unknown`
+
 ## Properties
 
 ### body?
 
-> `optional` **body**: `unknown`
+> `optional` **body**: `B`
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:18](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L18)
+[packages/fetch/src/fetch.ts:18](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L18)
 
 ***
 
@@ -22,7 +24,7 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L20)
+[packages/fetch/src/fetch.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L20)
 
 ***
 
@@ -32,7 +34,7 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:17](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L17)
+[packages/fetch/src/fetch.ts:17](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L17)
 
 ***
 
@@ -42,7 +44,7 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:16](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L16)
+[packages/fetch/src/fetch.ts:16](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L16)
 
 ***
 
@@ -52,7 +54,7 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:19](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L19)
+[packages/fetch/src/fetch.ts:19](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L19)
 
 ***
 
@@ -62,4 +64,4 @@
 
 #### Defined in
 
-[packages/fetch/src/fetch.ts:15](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L15)
+[packages/fetch/src/fetch.ts:15](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L15)
diff --git a/apps/docs/docs/fetch/packages.md b/apps/docs/docs/fetch/packages.md
index 8c45848d..f5dab01d 100644
--- a/apps/docs/docs/fetch/packages.md
+++ b/apps/docs/docs/fetch/packages.md
@@ -1,4 +1,4 @@
-# @nf-team/fetch v1.1.0
+# @nf-team/fetch v1.2.0
 
 ## Classes
 
diff --git a/apps/docs/docs/fetch/type-aliases/Method.md b/apps/docs/docs/fetch/type-aliases/Method.md
index 18e8c539..89f0f6f7 100644
--- a/apps/docs/docs/fetch/type-aliases/Method.md
+++ b/apps/docs/docs/fetch/type-aliases/Method.md
@@ -4,4 +4,4 @@
 
 ## Defined in
 
-[packages/fetch/src/fetch.ts:12](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/fetch/src/fetch.ts#L12)
+[packages/fetch/src/fetch.ts:12](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/fetch/src/fetch.ts#L12)
diff --git a/apps/docs/docs/react/components/functions/ClientOnly.md b/apps/docs/docs/react/components/functions/ClientOnly.md
index a966a69a..53f16878 100644
--- a/apps/docs/docs/react/components/functions/ClientOnly.md
+++ b/apps/docs/docs/react/components/functions/ClientOnly.md
@@ -33,4 +33,4 @@ function ClintOnlyComponent() {
 
 ## Defined in
 
-[packages/react/src/components/ClientOnly.tsx:22](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/components/ClientOnly.tsx#L22)
+[packages/react/src/components/ClientOnly.tsx:22](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/components/ClientOnly.tsx#L22)
diff --git a/apps/docs/docs/react/components/functions/DelayRenderComponent.md b/apps/docs/docs/react/components/functions/DelayRenderComponent.md
index 9cdef939..671b3918 100644
--- a/apps/docs/docs/react/components/functions/DelayRenderComponent.md
+++ b/apps/docs/docs/react/components/functions/DelayRenderComponent.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[packages/react/src/components/DelayRenderComponent.tsx:12](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/components/DelayRenderComponent.tsx#L12)
+[packages/react/src/components/DelayRenderComponent.tsx:12](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/components/DelayRenderComponent.tsx#L12)
diff --git a/apps/docs/docs/react/components/functions/GlobalPortal.md b/apps/docs/docs/react/components/functions/GlobalPortal.md
index 22735be7..8a1757ce 100644
--- a/apps/docs/docs/react/components/functions/GlobalPortal.md
+++ b/apps/docs/docs/react/components/functions/GlobalPortal.md
@@ -38,4 +38,4 @@ function SampleComponent() {
 
 ## Defined in
 
-[packages/react/src/components/GlobalPortal.tsx:34](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/components/GlobalPortal.tsx#L34)
+[packages/react/src/components/GlobalPortal.tsx:34](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/components/GlobalPortal.tsx#L34)
diff --git a/apps/docs/docs/react/hooks/functions/useActionKeyEvent.md b/apps/docs/docs/react/hooks/functions/useActionKeyEvent.md
index 4dd1b819..a0719359 100644
--- a/apps/docs/docs/react/hooks/functions/useActionKeyEvent.md
+++ b/apps/docs/docs/react/hooks/functions/useActionKeyEvent.md
@@ -20,4 +20,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useActionKeyEvent.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useActionKeyEvent.ts#L6)
+[packages/react/src/hooks/useActionKeyEvent.ts:6](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useActionKeyEvent.ts#L6)
diff --git a/apps/docs/docs/react/hooks/functions/useBoolean.md b/apps/docs/docs/react/hooks/functions/useBoolean.md
index b30b9270..2a7a56e0 100644
--- a/apps/docs/docs/react/hooks/functions/useBoolean.md
+++ b/apps/docs/docs/react/hooks/functions/useBoolean.md
@@ -24,4 +24,4 @@ const [isOpen, openModal, closeModal, toggleModal] = useBoolean();
 
 ## Defined in
 
-[packages/react/src/hooks/useBoolean.ts:13](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useBoolean.ts#L13)
+[packages/react/src/hooks/useBoolean.ts:13](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useBoolean.ts#L13)
diff --git a/apps/docs/docs/react/hooks/functions/useDebounce.md b/apps/docs/docs/react/hooks/functions/useDebounce.md
index e713603e..85e09c8a 100644
--- a/apps/docs/docs/react/hooks/functions/useDebounce.md
+++ b/apps/docs/docs/react/hooks/functions/useDebounce.md
@@ -18,4 +18,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useDebounce.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useDebounce.ts#L3)
+[packages/react/src/hooks/useDebounce.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useDebounce.ts#L3)
diff --git a/apps/docs/docs/react/hooks/functions/useEffectOnce.md b/apps/docs/docs/react/hooks/functions/useEffectOnce.md
index d07d7d60..8b959ea1 100644
--- a/apps/docs/docs/react/hooks/functions/useEffectOnce.md
+++ b/apps/docs/docs/react/hooks/functions/useEffectOnce.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useEffectOnce.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useEffectOnce.ts#L3)
+[packages/react/src/hooks/useEffectOnce.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useEffectOnce.ts#L3)
diff --git a/apps/docs/docs/react/hooks/functions/useGeolocation.md b/apps/docs/docs/react/hooks/functions/useGeolocation.md
index 38bf29a8..c8726a5e 100644
--- a/apps/docs/docs/react/hooks/functions/useGeolocation.md
+++ b/apps/docs/docs/react/hooks/functions/useGeolocation.md
@@ -8,4 +8,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useGeolocation.ts:15](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useGeolocation.ts#L15)
+[packages/react/src/hooks/useGeolocation.ts:15](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useGeolocation.ts#L15)
diff --git a/apps/docs/docs/react/hooks/functions/useIsFirstRender.md b/apps/docs/docs/react/hooks/functions/useIsFirstRender.md
index 409df1df..dbcbeab8 100644
--- a/apps/docs/docs/react/hooks/functions/useIsFirstRender.md
+++ b/apps/docs/docs/react/hooks/functions/useIsFirstRender.md
@@ -8,4 +8,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useIsFirstRender.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useIsFirstRender.ts#L3)
+[packages/react/src/hooks/useIsFirstRender.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useIsFirstRender.ts#L3)
diff --git a/apps/docs/docs/react/hooks/functions/useIsMounted.md b/apps/docs/docs/react/hooks/functions/useIsMounted.md
index 6059e678..59b738ff 100644
--- a/apps/docs/docs/react/hooks/functions/useIsMounted.md
+++ b/apps/docs/docs/react/hooks/functions/useIsMounted.md
@@ -26,4 +26,4 @@ useEffect(() => {
 
 ## Defined in
 
-[packages/react/src/hooks/useIsMounted.ts:18](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useIsMounted.ts#L18)
+[packages/react/src/hooks/useIsMounted.ts:18](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useIsMounted.ts#L18)
diff --git a/apps/docs/docs/react/hooks/functions/useIsomorphicLayoutEffect.md b/apps/docs/docs/react/hooks/functions/useIsomorphicLayoutEffect.md
index f2975f1d..164e1dfb 100644
--- a/apps/docs/docs/react/hooks/functions/useIsomorphicLayoutEffect.md
+++ b/apps/docs/docs/react/hooks/functions/useIsomorphicLayoutEffect.md
@@ -28,4 +28,4 @@ If present, effect will only activate if the values in the list change.
 
 ## Defined in
 
-[packages/react/src/hooks/useIsomorphicLayoutEffect.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useIsomorphicLayoutEffect.ts#L3)
+[packages/react/src/hooks/useIsomorphicLayoutEffect.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useIsomorphicLayoutEffect.ts#L3)
diff --git a/apps/docs/docs/react/hooks/functions/useLessThenScrollY.md b/apps/docs/docs/react/hooks/functions/useLessThenScrollY.md
index 1fef9264..8dab4c0d 100644
--- a/apps/docs/docs/react/hooks/functions/useLessThenScrollY.md
+++ b/apps/docs/docs/react/hooks/functions/useLessThenScrollY.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useLessThenScrollY.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useLessThenScrollY.ts#L5)
+[packages/react/src/hooks/useLessThenScrollY.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useLessThenScrollY.ts#L5)
diff --git a/apps/docs/docs/react/hooks/functions/useResizeViewportHeight.md b/apps/docs/docs/react/hooks/functions/useResizeViewportHeight.md
index 8a92b274..7843a78f 100644
--- a/apps/docs/docs/react/hooks/functions/useResizeViewportHeight.md
+++ b/apps/docs/docs/react/hooks/functions/useResizeViewportHeight.md
@@ -24,4 +24,4 @@ function SampleComponent() {
 
 ## Defined in
 
-[packages/react/src/hooks/useResizeViewportHeight.ts:17](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useResizeViewportHeight.ts#L17)
+[packages/react/src/hooks/useResizeViewportHeight.ts:17](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useResizeViewportHeight.ts#L17)
diff --git a/apps/docs/docs/react/hooks/functions/useThrottleCallback.md b/apps/docs/docs/react/hooks/functions/useThrottleCallback.md
index 1c8424f2..425b3b49 100644
--- a/apps/docs/docs/react/hooks/functions/useThrottleCallback.md
+++ b/apps/docs/docs/react/hooks/functions/useThrottleCallback.md
@@ -28,4 +28,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useThrottleCallback.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useThrottleCallback.ts#L3)
+[packages/react/src/hooks/useThrottleCallback.ts:3](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useThrottleCallback.ts#L3)
diff --git a/apps/docs/docs/react/hooks/functions/useTimeout.md b/apps/docs/docs/react/hooks/functions/useTimeout.md
index 5ba4eec4..ba48361b 100644
--- a/apps/docs/docs/react/hooks/functions/useTimeout.md
+++ b/apps/docs/docs/react/hooks/functions/useTimeout.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useTimeout.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useTimeout.ts#L5)
+[packages/react/src/hooks/useTimeout.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useTimeout.ts#L5)
diff --git a/apps/docs/docs/react/hooks/functions/useUnmount.md b/apps/docs/docs/react/hooks/functions/useUnmount.md
index 75270644..b3ba39b1 100644
--- a/apps/docs/docs/react/hooks/functions/useUnmount.md
+++ b/apps/docs/docs/react/hooks/functions/useUnmount.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useUnmount.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useUnmount.ts#L5)
+[packages/react/src/hooks/useUnmount.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useUnmount.ts#L5)
diff --git a/apps/docs/docs/react/hooks/functions/useUpdateEffect.md b/apps/docs/docs/react/hooks/functions/useUpdateEffect.md
index 98d66b45..229e56aa 100644
--- a/apps/docs/docs/react/hooks/functions/useUpdateEffect.md
+++ b/apps/docs/docs/react/hooks/functions/useUpdateEffect.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[packages/react/src/hooks/useUpdateEffect.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/react/src/hooks/useUpdateEffect.ts#L5)
+[packages/react/src/hooks/useUpdateEffect.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/react/src/hooks/useUpdateEffect.ts#L5)
diff --git a/apps/docs/docs/storage/functions/getLocalStorageItem.md b/apps/docs/docs/storage/functions/getLocalStorageItem.md
index 4e977312..7ee5db4c 100644
--- a/apps/docs/docs/storage/functions/getLocalStorageItem.md
+++ b/apps/docs/docs/storage/functions/getLocalStorageItem.md
@@ -16,4 +16,4 @@
 
 ## Defined in
 
-[localStorage.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/localStorage.ts#L5)
+[localStorage.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/localStorage.ts#L5)
diff --git a/apps/docs/docs/storage/functions/getSessionStorageItem.md b/apps/docs/docs/storage/functions/getSessionStorageItem.md
index 02d20ce2..4e26b6f9 100644
--- a/apps/docs/docs/storage/functions/getSessionStorageItem.md
+++ b/apps/docs/docs/storage/functions/getSessionStorageItem.md
@@ -16,4 +16,4 @@
 
 ## Defined in
 
-[sessionStorage.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/sessionStorage.ts#L5)
+[sessionStorage.ts:5](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/sessionStorage.ts#L5)
diff --git a/apps/docs/docs/storage/functions/removeLocalStorageItem.md b/apps/docs/docs/storage/functions/removeLocalStorageItem.md
index 16073a8e..7b642f11 100644
--- a/apps/docs/docs/storage/functions/removeLocalStorageItem.md
+++ b/apps/docs/docs/storage/functions/removeLocalStorageItem.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[localStorage.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/localStorage.ts#L20)
+[localStorage.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/localStorage.ts#L20)
diff --git a/apps/docs/docs/storage/functions/removeSessionStorageItem.md b/apps/docs/docs/storage/functions/removeSessionStorageItem.md
index 95e3096a..d0ed1ab2 100644
--- a/apps/docs/docs/storage/functions/removeSessionStorageItem.md
+++ b/apps/docs/docs/storage/functions/removeSessionStorageItem.md
@@ -12,4 +12,4 @@
 
 ## Defined in
 
-[sessionStorage.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/sessionStorage.ts#L20)
+[sessionStorage.ts:20](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/sessionStorage.ts#L20)
diff --git a/apps/docs/docs/storage/functions/setLocalStorageItem.md b/apps/docs/docs/storage/functions/setLocalStorageItem.md
index 2b70ad7c..36266e69 100644
--- a/apps/docs/docs/storage/functions/setLocalStorageItem.md
+++ b/apps/docs/docs/storage/functions/setLocalStorageItem.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[localStorage.ts:1](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/localStorage.ts#L1)
+[localStorage.ts:1](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/localStorage.ts#L1)
diff --git a/apps/docs/docs/storage/functions/setSessionStorageItem.md b/apps/docs/docs/storage/functions/setSessionStorageItem.md
index 1247c73f..45ff7da9 100644
--- a/apps/docs/docs/storage/functions/setSessionStorageItem.md
+++ b/apps/docs/docs/storage/functions/setSessionStorageItem.md
@@ -14,4 +14,4 @@
 
 ## Defined in
 
-[sessionStorage.ts:1](https://github.com/mbti-nf-team/frontend-libraries/blob/08b9d43288f72c3d793bb8f598c64f689d769c2e/packages/storage/src/sessionStorage.ts#L1)
+[sessionStorage.ts:1](https://github.com/mbti-nf-team/frontend-libraries/blob/3916286534b50dbdcab9c2145adbaa464419b886/packages/storage/src/sessionStorage.ts#L1)
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index e313f9a9..bd432c2d 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -1,4 +1,4 @@
 export {
-  checkEmpty, checkNumber, emptyAThenB, generateArrayOfNumber,
-  isEmpty, removeNullable, trueOrFalse,
+  createNumberArray, emptyAThenB, ensureArray,
+  getNumberOrDefault, getStringOrDefault, isEmpty, trueOrFalse,
 } from './utils';
diff --git a/packages/core/src/utils.test.ts b/packages/core/src/utils.test.ts
index ff6cef7e..bd36b164 100644
--- a/packages/core/src/utils.test.ts
+++ b/packages/core/src/utils.test.ts
@@ -1,18 +1,18 @@
 import {
-  checkEmpty,
-  checkNumber,
+  createNumberArray,
   emptyAThenB,
-  generateArrayOfNumber,
+  ensureArray,
+  getNumberOrDefault,
+  getStringOrDefault,
   isEmpty,
-  removeNullable,
   trueOrFalse,
 } from './utils';
 
-describe('removeNullable', () => {
+describe('getStringOrDefault', () => {
   context('value가 null일 경우', () => {
     context('replacementValue가 존재하지 않는 경우', () => {
       it('빈 문자열을 반환해야만 한다', () => {
-        const result = removeNullable(null);
+        const result = getStringOrDefault(null);
 
         expect(result).toBe('');
       });
@@ -20,7 +20,7 @@ describe('removeNullable', () => {
 
     context('replacementValue가 존재하는 경우', () => {
       it('대체할 문자열(두 번째 인자)을 반환해야만 한다', () => {
-        const result = removeNullable(undefined, '-');
+        const result = getStringOrDefault(undefined, '-');
 
         expect(result).toBe('-');
       });
@@ -29,25 +29,33 @@ describe('removeNullable', () => {
 
   context('value가 null이 아닌 경우', () => {
     it('입력된 값이 반환되어야만 한다', () => {
-      const result = removeNullable('nana');
+      const result = getStringOrDefault('nana');
 
       expect(result).toBe('nana');
     });
   });
 });
 
-describe('checkNumber', () => {
+describe('getNumberOrDefault', () => {
   context('value가 null인 경우', () => {
     it('0을 반환해야 한다', () => {
-      const result = checkNumber(null);
+      const result = getNumberOrDefault(null);
 
       expect(result).toBe(0);
     });
+
+    context('defaultValue가 존재하는 경우', () => {
+      it('defaultValue를 반환해야 한다', () => {
+        const result = getNumberOrDefault(null, 100);
+
+        expect(result).toBe(100);
+      });
+    });
   });
 
   context('value가 null이 아닌 경우', () => {
     it('입력된 값이 반환되어야 한다', () => {
-      const result = checkNumber(100);
+      const result = getNumberOrDefault(100);
 
       expect(result).toBe(100);
     });
@@ -94,10 +102,10 @@ describe('trueOrFalse', () => {
   });
 });
 
-describe('checkEmpty', () => {
+describe('ensureArray', () => {
   context('value가 undefined이거나 빈 배열인 경우', () => {
     it('빈 배열을 반환해야만 한다', () => {
-      const result = checkEmpty();
+      const result = ensureArray();
 
       expect(result).toEqual([]);
     });
@@ -107,7 +115,7 @@ describe('checkEmpty', () => {
     const mockArray = ['test', 'test2'];
 
     it('입력된 값이 반환되어야 한다', () => {
-      const result = checkEmpty(mockArray);
+      const result = ensureArray(mockArray);
 
       expect(result).toEqual(mockArray);
     });
@@ -140,9 +148,9 @@ describe('isEmpty', () => {
   });
 });
 
-describe('generateArrayOfNumber', () => {
+describe('createNumberArray', () => {
   it('길이가 5인 배열을 반환해야만한다', () => {
-    const result = generateArrayOfNumber(5);
+    const result = createNumberArray(5);
 
     expect(result.length).toBe(5);
   });
diff --git a/packages/core/src/utils.ts b/packages/core/src/utils.ts
index f3e4cc79..0369ac30 100644
--- a/packages/core/src/utils.ts
+++ b/packages/core/src/utils.ts
@@ -11,7 +11,7 @@
  * @param replacementValue - 두 번째 인자에 값이 존재하는 경우 첫 번째 인자가 `null` 또는 `undefined`인 경우 두번째 인자로 문자열 대체
  * @returns
  */
-export const removeNullable = (value?: string | null, replacementValue?: string): string => {
+export const getStringOrDefault = (value?: string | null, replacementValue?: string): string => {
   if (value) {
     return value;
   }
@@ -23,13 +23,10 @@ export const removeNullable = (value?: string | null, replacementValue?: string)
   return '';
 };
 
-export const checkNumber = (value?: number | null): number => {
-  if (typeof value === 'number') {
-    return value;
-  }
-
-  return 0;
-};
+export const getNumberOrDefault = (
+  value?: number | null,
+  defaultValue = 0,
+): number => value ?? defaultValue;
 
 export const emptyAThenB = (b: string, a?: string | null): string => a || b;
 
@@ -41,7 +38,7 @@ export const trueOrFalse = (value?: string | null | number | boolean): boolean =
   return true;
 };
 
-export const checkEmpty = <T>(value?: T[]): T[] => {
+export const ensureArray = <T>(value?: T[]): T[] => {
   if (!value || !value.length) {
     return [];
   }
@@ -61,4 +58,4 @@ export const isEmpty = <T>(value?: T[]) => {
   return true;
 };
 
-export const generateArrayOfNumber = (length: number) => Array.from({ length }, (_, i) => i);
+export const createNumberArray = (length: number) => Array.from({ length }, (_, i) => i);