To reduce the meteorological data statistic workload and enhance the abilities of meteorological monitoring and forecasting service, the Kunming Meteorological Information Query System is designed with the B/S structure system for weather forecasters in prefecturallevel meteorological observatories, by using the RIA and WebGIS technology of Silverlight. This system achieved the realtime display of geographic maps and the surfing of observational data, refined forecast data, and Doppler radar echo data efficiently. The application indicates that these statistic meteorological information can be used in weather forecasting, meteorological monitoring，the shortterm forecasting, nowcasting, and disaster weather warning meteorological operations visually, immediately and directly from the system, with which scientific and efficient technology support can be supplied.