diff --git a/.env b/.env
new file mode 100644
index 0000000..a4b9946
--- /dev/null
+++ b/.env
@@ -0,0 +1,32 @@
+# Local debug overrides
+DEBUG_SERVER_HOST=0.0.0.0
+
+# Alarm upload - cloud API URL (WVP backend)
+CLOUD_API_URL=http://124.221.55.225:18080
+
+# ===== 边缘设备 ID（第二台 Edge 节点，必须与 WVP 数据库 ROI 表的 device_id 一致） =====
+EDGE_DEVICE_ID=edge_002
+
+# ===== 配置同步模式（REDIS=监听云端Stream, LOCAL=仅本地SQLite） =====
+CONFIG_SYNC_MODE=REDIS
+
+# ===== 云端 Redis（截图处理器 + 配置同步，db=1） =====
+CLOUD_REDIS_HOST=sh-crs-6upea3zn.sql.tencentcdb.com
+CLOUD_REDIS_PORT=24637
+CLOUD_REDIS_DB=1
+CLOUD_REDIS_PASSWORD=HkVZkVnn1
+
+# ===== 腾讯云 COS（截图上传） =====
+COS_REGION=ap-shanghai
+COS_BUCKET=xhwkzx-1-1389966313
+COS_SECRET_ID=AKIDVxPiqmVhYv7FCwVqytdAVddQ2TJySt9I
+COS_SECRET_KEY=1rVyEI8mMVWs21xfBUjy4BE6DA4z7KWb
+
+# ===== 本地 Redis（告警队列、配置缓存） =====
+LOCAL_REDIS_HOST=localhost
+LOCAL_REDIS_PORT=6379
+LOCAL_REDIS_DB=0
+
+# ===== 推理配置（GTX 1050 Ti 2GB 显存优化） =====
+BATCH_SIZE=1
+VIDEO_DEFAULT_FPS=3
diff --git a/core/screenshot_handler.py b/core/screenshot_handler.py
index 5e0d303..8eb033a 100644
--- a/core/screenshot_handler.py
+++ b/core/screenshot_handler.py
@@ -26,7 +26,7 @@ logger = logging.getLogger(__name__)
 # Redis 常量
 SNAP_REQUEST_STREAM = "edge_snap_request"
 SNAP_CONSUMER_GROUP = "edge_snap_group"
-SNAP_CONSUMER_NAME = "edge_snap_worker"
+SNAP_CONSUMER_NAME_PREFIX = "edge_snap_worker"
 SNAP_RESULT_KEY_PREFIX = "snap:result:"
 SNAP_RESULT_TTL = 60       # 降级结果 key 60s 过期
 
@@ -54,6 +54,8 @@ class ScreenshotHandler:
         self._settings = get_settings()
         self._cos_client = None
         self._cos_config: COSConfig = self._settings.cos
+        self._device_id = self._settings.mqtt.device_id
+        self._consumer_name = f"{SNAP_CONSUMER_NAME_PREFIX}_{self._device_id}"
 
         self._thread: Optional[threading.Thread] = None
         self._stop_event = threading.Event()
@@ -79,7 +81,8 @@ class ScreenshotHandler:
             daemon=True,
         )
         self._thread.start()
-        logger.info("[截图] 截图处理器已启动")
+        logger.info("[截图] 截图处理器已启动, consumer=%s, device_id=%s",
+                    self._consumer_name, self._device_id)
 
     def stop(self):
         """停止截图监听线程"""
@@ -159,7 +162,7 @@ class ScreenshotHandler:
             try:
                 results = self._cloud_redis.xreadgroup(
                     SNAP_CONSUMER_GROUP,
-                    SNAP_CONSUMER_NAME,
+                    self._consumer_name,
                     {SNAP_REQUEST_STREAM: ">"},
                     count=1,
                     block=5000,
@@ -221,6 +224,13 @@ class ScreenshotHandler:
             })
             return
 
+        # 多 Edge 设备隔离：如果消息指定了 device_id 且不是本设备，跳过
+        target_device_id = fields.get("device_id", "")
+        if target_device_id and target_device_id != self._device_id:
+            logger.debug("[截图] 跳过非本设备请求: target=%s, self=%s, request_id=%s",
+                         target_device_id, self._device_id, request_id)
+            return
+
         rtsp_url = fields.get("rtsp_url", "")
 
         logger.info("[截图] 收到截图请求: request_id=%s, camera=%s, callback=%s",