Abstract: A greenhouse tomato remote monitoring system based on the Gizwits Cloud platform was designed.The upper computer consisted of a mobile phone APP terminal and the Gizwits platform.The lower computer part used STM32F103 single-chip microcomputer as controller to upload environmental parameters obtained by sensor to upper computer，ESP8266Wi-Fi module realized data interaction between upper computer and lower computer.The user could use host computer to remotely monitor and control growth parameters of greenhouse tomato environment.After testing，design data was obtained accurately and the system ran stably to achieve expected functions.