The Service provided by librarians is different from that by other public functionaries. A librarian must have greater endurance physically and mentally to satisfy diversified needs brought by users. They also need to work on the night/holiday shift. In addition, librarian should maintain a neat figure to the public, and enhance service quality through proper career planning and lifelong learning. This paper discusses career planning of librarian including meaning, importance, principles, procedures, contents and approaches to provide some suggestions for fellow librarians.