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The system of airspace application for weather modification by cannons and rockets in Henan Province was developed in order to solve the problems encountered in the process of airspace request by telephone, such as slow transmitting, consuming too much manpower and frequent failures. The system makes full use of the advanced meteorological operation network, adopts the Client/Sever mode, and can deal with the real time information about the airspace requests and answers by computers. It can also save automatically the information of the airspace requests and answers in the database, the seeding information, and the information about seeding effectiveness and operating positions. The system can give alarms and make prior airspace requests while the weather situations being favorable to weather modification. The design method and a new model of the technology system of precipitation enhancement by cannons and rockets are presented.