With the development and popularization of network technology, English autonomous learning in network environment has become an inevitable trend in the development of foreign language teaching. In this paper, studies the problems existed in the English autonomous learning under current network environment. Firstly, studies autonomous learning theory, including meta-cognitive theory, constructivist theory, humanistic theory and so on; then, designs the architecture of online learning platform composed by user layer, service layer, application layer, and data layers, and shows the functions of students users, teachers and administrators user; Finally, studies English autonomous learning strategies, including social affective strategies, cross-cultural communication strategies, questions assistance strategies and issues guide strategies. Results of this study play an important role for promoting English learning under network environment.