简要介绍了工程坝址区最为关键的坝基深层抗滑稳定、永久船闸高坡稳定、地下电站主厂房围岩块体稳定、断裂构造等几个工程地质问题研究过程、方法、工作内容及基本结论，并结合工程施工、监测及运行有关情况对各专题进行全面总结与评价。

The site geological investigation and research work of the Three Gorges Project (TGP) has lasted for more than 50 years, which catches wide attention at home and abroad due to its depth and extent. The research processes, approaches, contents and basic conclusions for the key engineering geological problems of dam site are briefly introduced, including the deep anti-sliding stability of dam foundation, the high slope stability of permanent ship-lock, the surrounding rock mass stability of the main plant of underground powerhouse and the faulted structures. Finally, an overall summarization and evaluation of the research are presented based on the situations of project construction, monitoring and operation.