Abstract: SanmenXia Power Plant is a Large-scale thermal power plant and requires a big sum of water. The water resources is poor in the Sanmen-Xia area. By analysing the Hydrological anh Hydrogeological Conditions of the area, a Plan that ground, river and reservoir water Should be multipurpose and Coordinate used is put forward for supplying water to the first phase and near future of the project, and a new plan is also suggested for Supplying water to the future of the project in this article.