The frequent occurrence of forest fire in nature has brought considerable losses to various countries. The design of an intel- ligent early warning system for forest fire is particularly important. The system is based on ZigBee intelligent networking system. It consists of the front-end module of the fire alarm information collection system, the system data forwarding module and the remote terminal module. Through the front-end data acquisition module, the fire alarm information of the forest scene is transmitted to the terminal module in real time. The information is processed by the terminal to form an information judgment, that is, the alarm can be displayed in the data monitoring center in real time. The information can also be sent to the patrol personnel through the mobile phone terminal to carry out real-time monitoring of the scene.