At present, the power supply of conventional weather stations in our province mainly depends on the photovoltaic effect of solar panels. As the power supply of stations is easily affected by sunlight, environment, battery performance and other factors, the faults caused by power supply system have accounted for about 60% of all failures. In order to monitor the power supply status of the stations in real time and effectively, this paper mainly introduces how to develop the automatic stations power supply state monitoring system through the at89c52 series single chip microcomputer. Based on the hardware development of the single chip microcomputer, it realizes the three-way acquisition of the solar panel, battery and load terminal voltage of the conventional weather stations, and integrates the temperature and humidity sensor to collect the temperature and humidity data inside the power cabinets. Data transmission is based on GPRS communication principle. Under the set threshold, the system will analyze the collected data, inform relevant support personnel through wechat client information push, and obtain fault information at the first time. This design realizes the automatic monitoring and alarm function of the power supply state of the conventional weather stations, and plays a positive role in improving the data transmission rate of the stations.