The Three Gorges Project (TGP) has the characteristic of engineering largeness and technology complexity. The Three Gorges Reservoir started storing water on June 1, 2003, and water level reached 135 m on June 10. The double-way consecutive five-step ship locks succeeded trial navigation on June 16, 2003. The first hydro turbine generator units were put into operation on left bank in July, there were 6 sets hydro turbine generator in operation at the end of 2003. The Phase Ⅱ construction of TGP, in terms of storing water, navigation and power generation, has been finished. Breakthroughs have been made in a number of key technology problems, such as the TGP general layout and dam engineering, power station, the double-way consecutive five-step ship locks, super - hydro generator set, river diversion, river closure and cofferdam, research and practice of giant project’s management, etc.