The invention discloses an intelligent greenhouse management system comprising an implementation terminal, a communication terminal and an application terminal; the implementation terminal comprises an Internet of Things gateway, a sensor terminal node, a control terminal node and an execution device, and the sensor terminal node comprises a temperature and humidity sensor, an illumination sensor and a human body infrared sensor; and the sensor terminal node is electrically connected with the Internet of Things gateway, another interface of the Internet of Things gateway is electrically connected with the control terminal node, the control terminal node is wirelessly connected with the execution device, the execution device comprises a greenhouse and a spraying crane assembly, and the communication terminal comprises a WIFI communication module, a cloud end and an Internet of Things cloud platform. The application terminal comprises a database, an alarm monitor and a remote control, one ends of the database, the alarm monitor and the remote control are wirelessly connected with the Internet of Things cloud platform, and the other ends of the database, the alarm monitor and the remote control are wirelessly connected with the user mobile terminal, so that the barriers of high workload and high time consumption of traditional agriculture are broken, the agricultural greenhouse is managed more efficiently and conveniently, and agriculture develops in a more intelligent and more accurate direction.