As the largest in the world by far,the Three Gorges Project (TGP )is a multipurpose development and comprehensive utilization project that can bring a huge benefit by combining flood control, electric prowler generation and shipping. It is of large scale and technically complex. This paper expounds a large number of major technical problems that has been,and will be, solved in the construction of the project, and points out that the solution of these problems will be an important urge to the development of both water conservancy and hydraulic power generation science and technology.