In recent years，with the development of Internet technology and the growth of Internet users，online commentary has become more and more prominent in the network public opinion，and received a great deal of attention from the academic community and the industry. The general report defines the connotation of online commentary in this report，and combed the development phase of online commentary，and introduced the main types of online commentary in China from different standards and dimensions，and summarized the development environment，status and characteristics of online commentary from the perspective of policy，industry，technology and users.