As a current mainstream in wireless sensor network technology,ZigBee has the feature of low-cost,convenient network deployment,flexible-expansion and so on.This paper put forward to apply the ZigBee technology to granary environmental monitoring system.It can improve the flexibility and reliability compared to wired granary environmental monitoring system.The system uses CC1101 wireless transmission module and STC89C52 controller to implement the hardware and software design of transmission node.it achieves the automatic collection and wireless transmission for environmental parameters.And the data after gathering from coordinator node and be sent to the control center for further real-time analysis.