Along with the arrival of Chinese hydropower construction investment peak and the application of computer technology in the whole life cycle of hydropower station of every stage, isolated data appeared between different stages in the whole life cycle, as well as different professional module of the same stages. Based on the whole life cycle theory of hydropower station, overall planning informatization of basin wide hydropower development company was studied. The overall planning includes main information system modules of each stage of the whole life cycle of hydropower station, such as: basin wide or river planning stage, pre-feasibility study stage, feasibility study stage, bidding and construction stage, completion operating and maintenance stage and digitalization basin stage. Meanwhile, based on the transverse business sectors, management of comprehensive enterprise, hydropower station construction process, production operations, and function business modules of hydropower station was studied. After the implementation of the plan, whole process planning informatization is except to be unified, and a unified data model should be established. Finally, a new management model can be formed, the purpose of efficient management can be achieved.