diff --git a/main/xiaozhi-server/core/handle/iotHandle.py b/main/xiaozhi-server/core/handle/iotHandle.py
index 0af0bcde..edb7d338 100644
--- a/main/xiaozhi-server/core/handle/iotHandle.py
+++ b/main/xiaozhi-server/core/handle/iotHandle.py
@@ -144,33 +144,35 @@ class IotDescriptor:
         self.methods = []
 
         # 根据描述创建属性
-        for key, value in properties.items():
-            property_item = globals()[key] = {}
-            property_item["name"] = key
-            property_item["description"] = value["description"]
-            if value["type"] == "number":
-                property_item["value"] = 0
-            elif value["type"] == "boolean":
-                property_item["value"] = False
-            else:
-                property_item["value"] = ""
-            self.properties.append(property_item)
+        if properties is not None:
+            for key, value in properties.items():
+                property_item = globals()[key] = {}
+                property_item["name"] = key
+                property_item["description"] = value["description"]
+                if value["type"] == "number":
+                    property_item["value"] = 0
+                elif value["type"] == "boolean":
+                    property_item["value"] = False
+                else:
+                    property_item["value"] = ""
+                self.properties.append(property_item)
 
         # 根据描述创建方法
-        for key, value in methods.items():
-            method = globals()[key] = {}
-            method["description"] = value["description"]
-            method["name"] = key
-            for k, v in value["parameters"].items():
-                method[k] = {}
-                method[k]["description"] = v["description"]
-                if v["type"] == "number":
-                    method[k]["value"] = 0
-                elif v["type"] == "boolean":
-                    method[k]["value"] = False
-                else:
-                    method[k]["value"] = ""
-            self.methods.append(method)
+        if methods is not None:
+            for key, value in methods.items():
+                method = globals()[key] = {}
+                method["description"] = value["description"]
+                method["name"] = key
+                for k, v in value["parameters"].items():
+                    method[k] = {}
+                    method[k]["description"] = v["description"]
+                    if v["type"] == "number":
+                        method[k]["value"] = 0
+                    elif v["type"] == "boolean":
+                        method[k]["value"] = False
+                    else:
+                        method[k]["value"] = ""
+                self.methods.append(method)
 
 
 def register_device_type(descriptor):