Based on the rainfall data from AWS (Automatic Weather Stations) and the village and townlevel automatic precipitation stations, the Meteorological service, Monitoring and Autoalarming System was developed. Taking the database as the core, this system, by means of the basic meteorological service communication network and the client/server pattern, realized such functions as the regional areal precipitation appraisal, the monitoring of data gathering from village and townlevel automatic precipitation stations, the autoalarming of rainfall intensity according to the precipitation grades in the specified time periods, the realtime storage of AWS data, and the autodrawing of various color meteorological charts, etc. An introduction is made to the system structural design, the objectives of various subsystems, and the principles and methods for realizing various functions.