Abstract:With the rapid development of the Internet of things technology, control of devices in the same wireless local area network,there is a short transmission distance, poor mobility etc. To tackle this problem, here is one proposed remote control of Internet of things terminal implementation method, the serial to WiFi module, through the socket mode of transmission mechanism, the traditional serial port device can access the server based on the MQTT message transmission protocol in the Internet to complete the data sending and receiving, so that the terminal devices to break through the limitation of wireless communication distance, to achieve the purpose of remote data exchange and control. Experimental results show that the method is correct and reliable, and can be widely used in smart home, industrial control and other fields.