diff --git a/pkg/rule_engine/nodes/action_rpc_request_to_device_node.go b/pkg/rule_engine/nodes/action_rpc_request_to_device_node.go
index f20879e..557f357 100644
--- a/pkg/rule_engine/nodes/action_rpc_request_to_device_node.go
+++ b/pkg/rule_engine/nodes/action_rpc_request_to_device_node.go
@@ -51,7 +51,7 @@ func (n *rpcRequestToDeviceNode) Handle(msg *message.Message) error {
 	var datas = model.RpcPayload{
 		Params: msg.Msg.GetValue("params"),
 	}
-	if method, ok := msg.Metadata.GetValue("method").(string); ok {
+	if method, ok := msg.Msg.GetValue("method").(string); ok {
 		datas.Method = method
 	} else {
 		return errors.New("指令方法格式错误")