Mobile library, as an extension and supplement of digital library, has been paid close attention by library community at home and abroad. This paper firstly introduced Android development platform named Rexsee, and then designed and implemented a mobile library system has good compatibility and usability. The system has innovatively taken advantage of Rexsee development platform and used HTML, CSS and Javascript to implement mobile applications quickly. It can give access to both the browser user and the Android client user, improve system performance and user experiences.