The invention discloses a library information management system, and relates to a computer management system. The library information management system is provided with a system administrator unit, a librarian unit and a reader unit, wherein the system administrator unit comprises a user management module, a bookshelf management module, a library information management module, a personal password maintenance module and an information bulletin management module, the librarian unit comprises a bookshelf management module, another library information management module, a credential management module, a library management module, a circulation management module, an information bulletin inquiry module, an appointment management module, a book expiry reminding management module, a renewal audit management module, a postponement charging management module and a user deposit management module, and the reader unit comprises a new book recommendation inquiry module, a book inquiry module, a book borrowing management module, another information bulletin inquiry module, an appointment inquiry module, another book expiry reminding management module and a postponement charging inquiry module. The library information management system has the advantages of being rapid in information retrieval, convenient in search, high in reliability, large in storage capacity, strong in security, long in life, low in cost and the like.