The ideas behind the design, structure, procedure, and functions of the cloud seeding operational system for impounding water in a reservoir are described according to the characteristics of cloud seeding for increasing water in reservoirs. The approaches to realize these functions are introduced technically. The application experiment conduced in Dabieshan Moutain in the western Anhui Province is discussed. The system is simple and easy to use in the aspects of demand analysis, weather warning, operation control, effectiveness evaluation, data management, report making, and user platform, which can provide useful references for the establishment of similar operational precipitation enhancement systems.