The early warning system can meet the needs of Ministry of Emergency Managements at all levels for the comprehensive risk prevention and control of natural disasters. With rainstorm, snow, earthquake, forest fire and other risk events as clues, it can build a scenario application of multi-disaster types, full chain, and cross department collaboration, so as to realize the comprehensive monitoring and early warning business of natural disasters with clear hidden dangers, complete monitoring, accurate prediction, rapid assessment, and accurate prevention and control.