With the development of information technology, especially the development of mobile Internet, the library service modes are more and more diversified on the mobile terminal. At present, the mainstream services of mobile library include weibo, WeChat, mobile phone li-brary. Although the good interactive service and the relatively pushing service to the readers, its high development cost and the weak of real time capability cause some disadvantages. Proposes a new service mode for library which called Baidu to No. It does not need to be downloaded and installed, and the characteristics of the technology of zero threshold, makes the librarians can easily develop multi-func-tional application and has good experience for readers, which is a kind of new mobile client service mode of university library.