diff --git a/OpenAuth.WebApi/Model/mqtt/HmsAlarmParser.cs b/OpenAuth.WebApi/Model/mqtt/HmsAlarmParser.cs
index 377278b..f609ebd 100644
--- a/OpenAuth.WebApi/Model/mqtt/HmsAlarmParser.cs
+++ b/OpenAuth.WebApi/Model/mqtt/HmsAlarmParser.cs
@@ -6,11 +6,12 @@ namespace OpenAuth.WebApi.Model.mqtt
     public class HmsAlarmParser
     {
         private readonly JsonObject _hmsMessages;
-
-        public HmsAlarmParser(string hmsJsonPath)
+        private readonly string _getway;
+        public HmsAlarmParser(string hmsJsonPath, string getway)
         {
             string json = File.ReadAllText(hmsJsonPath);
             _hmsMessages = JsonNode.Parse(json)?.AsObject() ?? throw new Exception("hms.json 格式错误");
+            _getway = getway;
         }
 
         public List<LasaManageDeviceHms> ParseAlarmMessages(string rawJson)
@@ -72,6 +73,7 @@ namespace OpenAuth.WebApi.Model.mqtt
                     BId = bid,
                     TId = tid,
                     Level = level,
+                    Sn = _getway,
                     Module = module,
                     CreateTime = DateTime.Now,
                     MessageEn = en,
diff --git a/OpenAuth.WebApi/Model/mqtt/ThingEventHandler.cs b/OpenAuth.WebApi/Model/mqtt/ThingEventHandler.cs
index 0c52729..332d014 100644
--- a/OpenAuth.WebApi/Model/mqtt/ThingEventHandler.cs
+++ b/OpenAuth.WebApi/Model/mqtt/ThingEventHandler.cs
@@ -36,8 +36,8 @@ namespace OpenAuth.WebApi.Model.mqtt
                 var jsondata = JsonSerializer.Deserialize<HmsMessage>(payload);
 
                 var path = Path.Combine(AppContext.BaseDirectory, "hms.json");
-                var parser = new HmsAlarmParser(path);
-
+                string getway = topic.Split('/')[2];
+                var parser = new HmsAlarmParser(path, getway);
                 List<LasaManageDeviceHms> alarmMessages = null;
                 if (jsondata.data != null && jsondata.data.list?.Count > 0)
                 {