Abstract: This article thinks that the public morality education of university emphasizes the education theory but lacks behavior guide, and emphasizes classroom education but lacks social education.The article suggests that the library, where students＇social behavior shows,should shoulder the tasks of the public morality education.The artiele analyses much immoral behavior and the cause of immoral behavior in library, puts forward the means of correcting immoral behaviors.

Key words: university library;undergraduate;public morality education;immoral behavior