The system adopts rainfall data intelligent collection, long-term solid-state storage and long-distance transmission technology. The built-in sensor collects rainfall data, and transmits the data to the data collection management platform of the monitoring and early warning center through GPRS / SMS and other communication methods. After verification and analysis by the system, it is compared with the set warning value. When the rainfall exceeds the preset warning value, the system will send an alarm messag to the front-end alarm and monitoring and early warning center, so as to timely inform relevant personnel for processing.