The GISbased operation system of weather modification for prefecturelevel institutions consists of such parts as data analysis and transmission, operation control, and effectiveness evaluation, etc. According to the different characteristics of weather modification and hail suppression operation, the system can determine by means of radar images and cannon operation parameters, produce and send operation orders automatically. The receiving unit adopting GPRS (General Packet Radio Service) technology receives weather modification operation orders safely and delaylessly, in the operating mode of the prefecturelevel operational system from the control center directly to an operation site. The system is transplantable and can handle properly the issues existing in remote data sharing and remote transaction processing, so to realize the operationalization of weather modification operation control.