For low accuracy data,unreal-time and human resources waste in grain storage management,comprehensively using wireless communication technology and sensor technology,this paper proposed an environmental monitoring system based on WSN.It applied AM2301 to accurately capture temperature and humidity data of each node in grain storage.It formed a ZigBee wireless sensor network platform through CC2530 and transmit data safely.It used ZSensorMonitor to observe real-time environmental information.This system can reduce management cost,protect food security and improve management automation.