Abstract: The Integrated Ecosystem Management (IEM) is a legal principle of environmental law，which requires that human beings should take integrated measures to exploit and protect environment and mingle different measures related with ecosystem management together.To put the legal principle into enforcement，an integrated environmental administrative management system should be built up.Measures should be adopted to manage watershed and the cross-administrative regions,comprehensive laws should be made to protect environment,and the existing laws and regulations should be integrated on the basis of a successful reform in the sectored legislative system.

Key words: environmental law, integrated ecosystem management