diff --git a/src/client.ts b/src/client.ts
index df996c4..658e0af 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -1,6 +1,6 @@
 import { RestAPI } from "./rest";
 import { audioQuery } from "./audio_query";
-import { preset } from "./preset";
+import { Preset } from "./preset";
 
 // voicevox client
 /**
@@ -70,8 +70,37 @@ export class Client {
   }
 
   // Fetch presets
-  async fetchPresets(): Promise<preset[]> {
+  /**
+   * @returns Presets
+   */
+  async fetchPresets(): Promise<Preset[]> {
     let presets = await this.rest.getPresets();
-    return presets.map((x) => new preset(x));
+    return presets.map((x) => new Preset(x));
+  }
+
+  // Add preset
+  /**
+   * @param preset - Preset
+   * @returns Preset ID
+   */
+  async addPreset(preset: Preset): Promise<number> {
+    return await this.rest.addPreset({ ...preset });
+  }
+
+  // Update preset
+  /**
+   * @param preset - Preset
+   * @returns Preset ID
+   */
+  async updatePreset(preset: Preset): Promise<number> {
+    return await this.rest.updatePreset({ ...preset });
+  }
+
+  // Delete preset
+  /**
+   * @param id - Preset ID
+   */
+  async deletePreset(id: number): Promise<void> {
+    return await this.rest.deletePreset(id);
   }
 }
diff --git a/src/preset.ts b/src/preset.ts
index fdea368..6212348 100644
--- a/src/preset.ts
+++ b/src/preset.ts
@@ -1,7 +1,7 @@
-import { preset as presetT } from "./types/preset";
+import { Preset as PresetT } from "./types/preset";
 
 // preset
-export class preset {
+export class Preset {
   public id: number;
   public name: string;
   public speaker_uuid: string;
@@ -13,7 +13,7 @@ export class preset {
   public prePhonemeLength: number;
   public postPhonemeLength: number;
 
-  constructor(preset: presetT) {
+  constructor(preset: PresetT) {
     this.id = preset.id;
     this.name = preset.name;
     this.speaker_uuid = preset.speaker_uuid;
diff --git a/src/rest.ts b/src/rest.ts
index b2f14bc..a10de78 100644
--- a/src/rest.ts
+++ b/src/rest.ts
@@ -3,7 +3,7 @@ import {
   createAudioQueryOptions,
   createAudioQueryFromPresetOptions,
 } from "./types/audioquery";
-import { preset } from "./types/preset";
+import { Preset, DeletePresetOptions } from "./types/preset";
 import { synthesisParams } from "./types/synthesis";
 
 type fetchOptions = {
@@ -94,7 +94,28 @@ export class RestAPI {
     });
   }
 
-  async getPresets(): Promise<preset[]> {
+  async getPresets(): Promise<Preset[]> {
     return await this.request("GET", "/presets");
   }
+
+  async addPreset(preset: Preset): Promise<number> {
+    return await this.request("POST", "/add_preset", {
+      body: preset,
+    });
+  }
+
+  async updatePreset(preset: Preset): Promise<number> {
+    return await this.request("POST", "/update_preset", {
+      body: preset,
+    });
+  }
+
+  async deletePreset(id: number): Promise<void> {
+    let params: DeletePresetOptions = {
+      id: id,
+    };
+    return await this.request("POST", "/delete_preset", {
+      params: params,
+    });
+  }
 }
diff --git a/src/types/preset.ts b/src/types/preset.ts
index 9501a46..a91898d 100644
--- a/src/types/preset.ts
+++ b/src/types/preset.ts
@@ -1,4 +1,4 @@
-export interface preset {
+export interface Preset {
   id: number;
   name: string;
   speaker_uuid: string;
@@ -10,3 +10,7 @@ export interface preset {
   prePhonemeLength: number;
   postPhonemeLength: number;
 }
+
+export interface DeletePresetOptions {
+  id: number;
+}
diff --git a/tests/preset.ts b/tests/preset.ts
new file mode 100644
index 0000000..0f9c514
--- /dev/null
+++ b/tests/preset.ts
@@ -0,0 +1,33 @@
+import assert from "assert";
+import Client from "../dist";
+import { Preset } from "../dist/preset";
+
+const client = new Client("http://127.0.0.1:50021");
+
+async function main() {
+  const presets = await client.fetchPresets();
+  const preset = new Preset({
+    id: 1000,
+    name: "string",
+    speaker_uuid: "string",
+    style_id: 0,
+    speedScale: 0,
+    pitchScale: 0,
+    intonationScale: 0,
+    volumeScale: 0,
+    prePhonemeLength: 0,
+    postPhonemeLength: 0,
+  });
+
+  preset.id = await client.addPreset(preset);
+  assert(presets.length + 1 === (await client.fetchPresets()).length);
+
+  preset.speedScale = 2;
+  await client.updatePreset(preset);
+  assert(presets.length + 1 === (await client.fetchPresets()).length);
+
+  await client.deletePreset(preset.id);
+  assert(presets.length === (await client.fetchPresets()).length);
+}
+
+main();