The temperature and humidity of the grain depot directly affect the quality of the stored grain.The effective monitoring of temperature and humidity inside the grain depot has great significance to scientific storage .A design of temperature and humidity monitoring system of grain depot based on ZigBee is proposed in this paper. Analysis and design are presented for gathering network.The block diagrams of ZigBee node design and software flow are given.The experimental results show that the system is stable and reliable.The system has practical value.%粮库的温湿度直接影响了储存粮食的质量，粮仓内部的温湿度环境的有效监测对科学储粮具有重要意义。针对采集网络做了分析并给出了设计，提出了一种基于ZigBee的粮仓温湿度监测系统的设计方案，给出了ZigBee节点设计及软件流程框图。实验结果表明，系统稳定可靠，具有实用价值。
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