Based on the input-output table of 2002, 2007 and 2012, this paper analyzes the industrial correlation degree between the Internet industry and other related industries in China. The research shows that from the perspective of the relevance, the Internet industry has a huge demand for the manufacturing industry and its own, from the perspective of the former, the Internet industry to promote the role of the main focus in sports and entertainment, leasing and business services, Internet industry, accommodation and catering industry and real estate industry. Therefore, to ensure the coordinated and stable development of the Internet industry, one must not only handle its external relations, but also have to deal with their internal relations.