Abstract: The general situation,the main eco-environmental problems,the survey of present eco-environmental situation and ecological changes process of Lake Wuli were briefly introduced.The key factors of eco-reconstruction were analyzed from the conditions of hydrology,water quality and sediment.The corresponding eco-reconstruction countermeasures were put forward with consideration of the plans of new urban area and the new bank of Lake Wuli.The countermeasures included pollution sources control,habitat rehabilitation to create the conditions for ecological restoration,optimum design for artificial restoration of aquatic vegetation and aquatic ecosystem management.At the same time the mode and the way of ecosystem management were studied from the view of creating a new system and mechanism.