Abstract: In the several years of the past,the development of unprecedented size of the Chinese colleges and universities has pushed the higher education to a new phase of universal education.That the universities are emerging in a large number and a alldirection and variety of development prevails on the subjects and specialities in other colleges has put a demand for strengthening the subject service. This paper holds that the colleges and universities libraries have to start to set up the system of subject librarian from enhancing the consciousness of reference inquiry of librarian,defining the principle and thinking of the subject librarian system construction,accomplishing the training and selecting of subject librarian and establishing the interrelated regulations and measures so that the subject service can turn into the principal part of the reference service in Chinese colleges and universities in order to suit the needs of the readers.

Key words: subject service;the system of subject librarlan;reference service;university library