With the updating of science and technology, the development of modern agricultural technology in China is also progressing. The research of intelligent greenhouse control system has far-reaching significance. Greenhouse control system should meet the function demands of data acquisition, data transmission and remote monitoring. In this paper, the overall control structure of greenhouse is formulated within the framework of Internet of Things technology, which is divided into perception layer, transmission layer and application layer. Based on the architecture of Internet of Things and Zig Bee wireless sensor network technology, this paper designs four modules of the control system, including login management module, data display module, remote control module and system management module. The greenhouse control system of the Internet of Things is tested and analysed and the experimental results show that the system can achieve the expected effect of greenhouse.