The invention discloses an urban greening management system based on the Internet of Things, which includes a greening monitoring unit, a monitoring terminal, and a network terminal; the greening monitoring unit includes an information collection unit, an analog-to-digital conversion module, a data processing module, an execution module, and a wireless communication module; The monitoring terminal includes a data transmission module, a central processing unit, and a database module; the network terminal includes a weather monitoring module, which is used to monitor and forecast rainfall, and then form rainfall data and send it to the monitoring terminal through a wireless network connection. The present invention uses the combination of the humidity sensor and the human body proximity sensor. On the one hand, it can monitor the urban greening situation in real time, avoiding the death of the greening plants caused by the influence of the weather. Complete greening and survival rate greatly improve the efficiency of urban greening management, save manpower, material resources, and financial resources, with a high degree of automation and strong practicability.