diff --git a/应用/ProductClient/MonitorThread.cs b/应用/ProductClient/MonitorThread.cs
index bf38f2f..37e2093 100644
--- a/应用/ProductClient/MonitorThread.cs
+++ b/应用/ProductClient/MonitorThread.cs
@@ -265,7 +265,12 @@ namespace ProductClient
                 }
 
                 var jObj = JObject.Parse(html);
-                var r = JsonConvert.SerializeObject(jObj["Result"].Value<Object>());
+                if (jObj["Result"] == null)
+                {
+                    return;
+                }
+
+                var r = JsonConvert.SerializeObject(jObj.Value<Object>());
                 if (string.IsNullOrWhiteSpace(r))
                 {
                     return;