diff --git a/viewshanghai-module-iot/viewshanghai-module-iot-gateway/src/main/java/com/viewshanghai/module/iot/gateway/codec/jt808/IotJt808DeviceMessageCodec.java b/viewshanghai-module-iot/viewshanghai-module-iot-gateway/src/main/java/com/viewshanghai/module/iot/gateway/codec/jt808/IotJt808DeviceMessageCodec.java
index 2dc3438..da7704a 100644
--- a/viewshanghai-module-iot/viewshanghai-module-iot-gateway/src/main/java/com/viewshanghai/module/iot/gateway/codec/jt808/IotJt808DeviceMessageCodec.java
+++ b/viewshanghai-module-iot/viewshanghai-module-iot-gateway/src/main/java/com/viewshanghai/module/iot/gateway/codec/jt808/IotJt808DeviceMessageCodec.java
@@ -280,7 +280,7 @@ public class IotJt808DeviceMessageCodec implements IotDeviceMessageCodec {
      * <p>
      * 物模型标准格式（简化版，只保留 keyId 和 keyState）：
      * {
-     *   "eventId": "button_event",
+     *   "identifier": "button_event",  // 事件标识符，用于存储到数据库的 identifier 字段
      *   "eventTime": 1234567890,
      *   "params": {
      *     "keyId": 1,      // 0x01=短按1号键, 0x0B=长按1号键
@@ -297,8 +297,8 @@ public class IotJt808DeviceMessageCodec implements IotDeviceMessageCodec {
         
         Map<String, Object> result = new HashMap<>();
         
-        // 统一使用一个事件标识符
-        result.put("eventId", "button_event");
+        // 使用 identifier 字段（符合物模型标准格式），用于存储到数据库的 identifier 字段
+        result.put("identifier", "button_event");
         
         // 事件时间戳
         result.put("eventTime", System.currentTimeMillis());