One of the functions of the library is to provide reference service for university teachers and students. In this way, the subject service has become an important channel for the library to carry out the new-type Consultation Service. Subject Service is an active and interactive learning method. Its process is open and participatory. Libraries play a role in solving problems in this process. It is the original intention of the establishment of the subject service that the library should go deep into the readers and be responsible for them. And to provide them with professional advice, guide them to obtain more professional resources and information, which plays a key role in the research and learning of readers