diff --git a/Service/DeviceService.cs b/Service/DeviceService.cs
index 6f074de..47d4535 100644
--- a/Service/DeviceService.cs
+++ b/Service/DeviceService.cs
@@ -47,9 +47,11 @@ namespace LY.App.Service
                 .WhereIF(!string.IsNullOrEmpty(key), s => s.Name.Contains(key) || s.DeviceSN.Contains(key))
                 .OrderByDescending(s => s.Id)
                 .ToPageListAsync(pageNum, pageSize, total);
+
             items.ForEach(async s =>
             {
-                s.online = await _redisService.ExistsAsync(RedisKeyList.DeviceStatus(s.DeviceSN));
+                var key= RedisKeyList.DeviceStatus(s.DeviceSN);
+                s.online = await _redisService.ExistsAsync(key);
             });
             return new ApiResult()
             {