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Using the ArcGIS and computer servers as platforms, considering the local demands for weather modification, a WebGISbased command system of artificial rain enhancement was developed, bringing together operations on the provincial, city and county levels. Utilizing the new technologies of computer network, database, airland wireless transmission, GPS, GIS and text messaging, integrating meteorological products such radar, satellites, automatic weather station gauges, drought/flood indexes and numerical prediction, the system can issue in real time instructions and commands via the IE explorer for airplane and surface rain enhancement operations. The general outlines of design, system configuration, software functions and database design of the system are discussed.