: Library Information Systems is a business unit that collect, store, preserve and manage the utilization of library collections using the system. The information system has been widely used in a place with a variety of technologies and systems. The purpose of this paper is to design a library of existing information systems at the Faculty of Computer Science University of Lancang Kuning PekanbaruIn order to be computerized and facilitate the passage of library staff in processing the data book, data members, borrowing books and returning books. to quickly and accurately using a PHP application to be able to assist in the processing of the data book, data members, borrowing books and the process of returning books at the Faculty of Computer Science University of Lancang Kuning Pekanbaru.