diff --git a/custom_components/apti/const.py b/custom_components/apti/const.py
index 967e67c..823db1d 100644
--- a/custom_components/apti/const.py
+++ b/custom_components/apti/const.py
@@ -8,7 +8,7 @@
 from homeassistant.const import Platform
 
 DOMAIN = "apti"
-VERSION = "1.0.2"
+VERSION = "1.0.3"
 
 PLATFORMS: list[Platform] = [
     Platform.SENSOR
diff --git a/custom_components/apti/helper.py b/custom_components/apti/helper.py
index a4f4b89..99bc0c6 100644
--- a/custom_components/apti/helper.py
+++ b/custom_components/apti/helper.py
@@ -1,6 +1,8 @@
 """Defines helper function."""
 
 from typing import Any
+import aiofiles
+import json
 import re
 
 from .const import LOGGER
@@ -32,3 +34,25 @@ def find_value_by_condition(data_dict: dict, condition) -> Any | None:
 def is_phone_number(id_value: str) -> bool:
     phone_number_pattern = r'^010\d{8}$'
     return bool(re.match(phone_number_pattern, id_value))
+
+async def get_icon(
+    category: str,
+    key: str,
+    json_file_path: str = "custom_components/apti/icons/icon.json"
+) -> str:
+    try:
+        async with aiofiles.open(json_file_path, "r", encoding="utf-8") as file:
+            content = await file.read()
+            data = json.loads(content)
+        
+        if category in data:
+            icon = data[category].get(key, None)
+            if icon is None:
+                LOGGER.warning(f"Icon for key '{key}' in category '{category}' not found.")
+            return icon
+        else:
+            LOGGER.warning(f"Category '{category}' not found in icon data.")
+        return None
+    except (FileNotFoundError, json.JSONDecodeError) as e:
+        LOGGER.error(f"Error reading or decoding '{json_file_path}': {e}")
+        return None
diff --git a/custom_components/apti/icons/icon.json b/custom_components/apti/icons/icon.json
new file mode 100644
index 0000000..52f744f
--- /dev/null
+++ b/custom_components/apti/icons/icon.json
@@ -0,0 +1,34 @@
+{
+    "maint_item": {
+        "건물보험료": "mdi:home-lock",
+        "경비비": "mdi:security",
+        "공동수도료": "mdi:water-pump",
+        "공동전기료": "mdi:lightbulb-group",
+        "관리비 납부 금액": "mdi:currency-krw",
+        "기본난방비": "mdi:radiator",
+        "세대수도료": "mdi:water-outline",
+        "세대전기료": "mdi:flash-outline",
+        "소독비": "mdi:biohazard",
+        "수선유지비": "mdi:tools",
+        "승강기유지비": "mdi:elevator",
+        "승강기전기": "mdi:elevator-passenger-outline",
+        "위탁관리수수료": "mdi:account-cash",
+        "일반관리비": "mdi:clipboard-outline",
+        "입주자대표회의운": "mdi:account-group-outline",
+        "장기수선충당금": "mdi:hammer-wrench",
+        "청소비": "mdi:broom",
+        "커뮤니티사용료": "mdi:account-multiple-outline",
+        "커뮤니티시설유지": "mdi:account-group",
+        "홈네트워크": "mdi:network",
+        "TV수신료": "mdi:television-classic"
+    },
+    "energy_detail": {
+        "수도": "mdi:water",
+        "온수": "mdi:water-boiler",
+        "전기": "mdi:power-plug"
+    },
+    "energy_type": {
+        "열": "mdi:fire",
+        "전기": "mdi:currency-krw"
+    }
+}
\ No newline at end of file
diff --git a/custom_components/apti/manifest.json b/custom_components/apti/manifest.json
index 0ad52da..dfdb069 100644
--- a/custom_components/apti/manifest.json
+++ b/custom_components/apti/manifest.json
@@ -9,7 +9,8 @@
     "iot_class": "local_polling",
     "issue_tracker": "https://github.com/lunDreame/homeassistant-apti/issues",
     "requirements": [
-        "beautifulsoup4"
+        "beautifulsoup4",
+        "aiofiles"
     ],
-    "version": "1.0.2"
+    "version": "1.0.3"
 }
\ No newline at end of file
diff --git a/custom_components/apti/sensor.py b/custom_components/apti/sensor.py
index 3830631..9ed7035 100644
--- a/custom_components/apti/sensor.py
+++ b/custom_components/apti/sensor.py
@@ -13,68 +13,69 @@
 
 from .coordinator import APTiDataUpdateCoordinator
 from .entity import APTiDevice
-from .helper import find_value_by_condition
+from .helper import find_value_by_condition, get_icon
 
 
 @dataclass(kw_only=True)
 class APTiSensorEntityDescription(SensorEntityDescription):
     """Describes APT.i sensor entity."""
 
-    format_id: str
-    chepter_name: str
+    format_id: str     # unique_id
+    chepter_name: str  # device_info
     exists_fn: Callable[..., bool] = lambda _: True
+    icon_fn: Callable[..., str] = lambda _: None
+    trans_ph: Callable[..., dict] = lambda _: {}
     value_fn: Callable[..., datetime | str]
-    extra_attributes: Callable[..., dict] = lambda _: {}
 
 
 SENSORS: tuple[APTiSensorEntityDescription, ...] = (
     APTiSensorEntityDescription(
         key="maint_item",
         translation_key="maint_item",
-        translation_placeholders=lambda key: {"category": key["항목"]},
-        format_id=lambda key: f"{key['항목']}_maint_item",
+        native_unit_of_measurement="원",
+        format_id=lambda k: f"{k['항목']}_maint_item",
         chepter_name="관리비",
-        unit_of_measurement = "원",
-        value_fn=lambda value: find_value_by_condition(value, lambda k: k.startswith("당월")),
-        extra_attributes=lambda value: value,
+        icon_fn=lambda c, k: get_icon(c, k["항목"]),
+        trans_ph=lambda k: {"category": k["항목"]},
+        value_fn=lambda v: find_value_by_condition(v, lambda k: k.startswith("당월")),
     ),
     APTiSensorEntityDescription(
         key="maint_payment",
+        icon="mdi:currency-krw",
         translation_key="maint_payment",
+        native_unit_of_measurement="원",
         format_id="maint_payment",
         chepter_name="관리비",
-        unit_of_measurement = "원",
-        value_fn=lambda value: find_value_by_condition(value, lambda k: k.startswith("납부할 금액")),
-        extra_attributes=lambda value: value,
+        value_fn=lambda v: find_value_by_condition(v, lambda k: k.startswith("납부할 금액")),
     ),
     APTiSensorEntityDescription(
         key="energy_usage",
+        icon="mdi:flash",
         translation_key="energy_usage",
+        native_unit_of_measurement="원",
         format_id="energy_usage",
         chepter_name="에너지",
-        unit_of_measurement = "원",
-        value_fn=lambda value: find_value_by_condition(value, lambda k: k.endswith("사용")),
-        extra_attributes=lambda value: value,
+        value_fn=lambda v: find_value_by_condition(v, lambda k: k.endswith("사용")),
     ),
     APTiSensorEntityDescription(
         key="energy_detail",
         translation_key="energy_detail",
-        translation_placeholders=lambda key: {"category": key["유형"]},
-        format_id=lambda key: f"{key['유형']}_energy_detail",
+        native_unit_of_measurement="",
+        format_id=lambda k: f"{k['유형']}_energy_detail",
         chepter_name="에너지",
-        unit_of_measurement = "",
-        value_fn=lambda value: find_value_by_condition(value, lambda k: k.startswith("사용량")),
-        extra_attributes=lambda value: value,
+        icon_fn=lambda c, k: get_icon(c, k["유형"]),
+        trans_ph=lambda k: {"category": k["유형"]},
+        value_fn=lambda v: find_value_by_condition(v, lambda k: k.startswith("사용량")),
     ),
     APTiSensorEntityDescription(
         key="energy_type",
         translation_key="energy_type",
-        translation_placeholders=lambda key: {"category": key["유형"]},
-        format_id=lambda key: f"{key['유형']}_energy_type",
+        native_unit_of_measurement="원",
+        format_id=lambda k: f"{k['유형']}_energy_type",
         chepter_name="에너지",
-        unit_of_measurement = "원",
-        value_fn=lambda value: find_value_by_condition(value, lambda k: k.startswith("총액")),
-        extra_attributes=lambda value: value,
+        icon_fn=lambda c, k: get_icon(c, k["유형"]),
+        trans_ph=lambda k: {"category": k["유형"]},
+        value_fn=lambda v: find_value_by_condition(v, lambda k: k.startswith("총액")),
     ),
 )
 
@@ -114,19 +115,15 @@ def __init__(
         """Initialize the sensor."""
         super().__init__(coordinator, entity_description)
         self.entity_description = entity_description
+        self._value = coordinator.data[self.description.key]
 
+        self._attr_extra_state_attributes = self._value
         self._attr_unique_id = self.description.format_id
-        self._attr_extra_state_attributes = self.description.extra_attributes(
-            coordinator.data[self.description.key]
-        )
-
-        self._attr_native_unit_of_measurement = self.description.unit_of_measurement
 
     @property
     def native_value(self) -> str:
         """Return the state of the sensor."""
-        value = self.coordinator.data[self.description.key]
-        return self.description.value_fn(value)
+        return self.description.value_fn(self._value)
 
 
 class APTiCategorySensor(APTiDevice, SensorEntity):
@@ -143,23 +140,16 @@ def __init__(
         self.category = category
         self.entity_description = entity_description
         
+        self._attr_extra_state_attributes = category
+        self._attr_translation_placeholders = self.description.trans_ph(category)
         self._attr_unique_id = self.description.format_id(category)
-        self._attr_extra_state_attributes = self.description.extra_attributes(
-            category
-        )
-
-        self._attr_native_unit_of_measurement = self.description.unit_of_measurement
 
+    async def async_added_to_hass(self) -> None:
+        """Called when added to Hass."""
+        self._attr_icon = await self.description.icon_fn(self.description.key, self.category)
+        await super().async_added_to_hass()
+    
     @property
     def native_value(self) -> datetime | str:
         """Return the state of the sensor."""
         return self.description.value_fn(self.category)
-
-    @property
-    def translation_placeholders(self) -> dict[str, str] | None:
-        """Return the translation placeholders."""
-        if self.category:
-            return self.description.translation_placeholders(
-                self.category
-            )
-        return None