Be directed against the situation where grain's hot and mildew cannot be solved in time in the granary, which leads to loss, this thesis designs a kind of intelligent granary monitoring system which can realize real-time and remote monitoring in the process of grain storage. The system can be used to measure, display each point's temperature and humidity in the granary, control windows, high-power roller shutter doors and blowers to adjust environmental index, and detect and alarm smoke in the granary. Users can know the real-time situation of the granary and control its windows through remote monitoring of mobile phones and computers. To apply this approach can guarantee the quality of grain in the granaries and reduce the loss, which make it convenient for user to monitor and improve their work efficiency.