Three Gorges Project (TGP), the largest water resources and hydropower project in the world with huge scale and complex techniques, has great comprehensive benefits mainly in flood control, power generation and navigation improvement. Through 16year construction and operation, some valuable experience in the management system and mechanism for hydropower project construction have been gained, and its construction management mode produces important influence on the management system of domestic capital construction. With combination of the construction management practice of TGP, the characteristics of management system and mechanism are summarized, and the suggestions on current hydropower development system and construction management mode are put forward.