diff --git a/app/services/camera_name_service.py b/app/services/camera_name_service.py
index 4e68959..c624938 100644
--- a/app/services/camera_name_service.py
+++ b/app/services/camera_name_service.py
@@ -40,8 +40,8 @@ class CameraNameService:
             return cached[0]
 
         info = None
-        # camera_code 格式（推荐）：cam_ 前缀或 CAM 前缀
-        if device_id.startswith("cam_") or device_id.startswith("CAM"):
+        # camera_code 格式：cam 前缀（cam_xxx 或 camXXX 均支持）
+        if device_id.lower().startswith("cam"):
             info = await self._query_by_camera_code(device_id)
         # app/stream 格式（遗留格式，直接解析）
         elif "/" in device_id:
@@ -119,7 +119,7 @@ class CameraNameService:
         unique_ids = list(set(device_ids))
 
         # 分类：camera_code 和 app/stream 格式
-        camera_code_ids = [did for did in unique_ids if did.startswith("cam_")]
+        camera_code_ids = [did for did in unique_ids if did.lower().startswith("cam")]
         app_stream_ids = [did for did in unique_ids if "/" in did]
 
         # 初始化结果映射