In order to enhance the research and development of ground weather modification decisionmaking and command systems， the responsibilities and operation procedures of weather modification offices at various levels are discussed. Under the system that the surface weather modification operations are commanded mainly by citylevel weather modification offices， the major tasks of the provinciallevel weather modification offices are to make potential forecast and operation early warning. In the citylevel weather modification decisionmaking and command system， operations are based on the combined use of GIS， radar and other operation location data， with emphases on the operation indexes and the calculated operation parameters of artillery and rocket range， using GPRS to realize communication between the command center to operating points. The main responsibilities of countylevel weather modification offices are to monitor operations， make reports on operations and disasters to the city office， as well as command operations sometimes， and deal with some management affairs. The scheme can improve the reasonability and transmitting speeds of operation instructions，and can be put into operation.