Abstract: This paper discusses the content, background, significance, technical conditions and specific operation steps of ＂library cooperation ＂project of Douban. In connection with some limitations of ＂library cooperation ＂project, it proposes some solutions and suggestions, and points out that the cooperation between the library and Douban achieves the link from Douban to the library OPAC and libraries can.regard Douban as a propaganda platform to attract Douban users to use library resources.

Key words: Douban; library; social network; OPAC