diff --git a/app/services/notify_dispatch.py b/app/services/notify_dispatch.py
index 0c3c32c..aff103e 100644
--- a/app/services/notify_dispatch.py
+++ b/app/services/notify_dispatch.py
@@ -12,6 +12,7 @@
 VLM 或企微不可用时自动降级，不影响系统运行。
 """
 
+import os
 from datetime import datetime
 from typing import Dict, List
 
@@ -309,7 +310,11 @@ async def _get_area_name_from_iot(area_id: int) -> str:
     try:
         import httpx
         import time
-        base_url = settings.work_order.base_url
+        # IoT 平台地址（区域查询），优先级：IOT_PLATFORM_URL > WORK_ORDER_BASE_URL
+        base_url = (
+            os.getenv("IOT_PLATFORM_URL", "")
+            or settings.work_order.base_url
+        )
         if not base_url:
             return ""