Xi Jinping's statement on the construction of ecological civilization contains fertile thoughts on the modernization of environmental governance. The modernization of environmental governance concept is the ideological basis for promoting the modernization of environmental governance. Strengthening the leadership of the Party in environmental protection is the political guarantee to promote the modernization of environmental governance. The fundamental contents of environmental governance system modernization include perfecting the ecological environment supervision system, legal system, and policy-supporting system, and establishing a governance system which are jointly participated by the government, enterprises, social organizations and the public. To promote the modernization of environmental governance capacity, green technology innovation should be strengthened, and information construction of ecological environment monitoring network and analytic techniques of big data of environment are the fundamental contents.