This document describes an online library management system project developed using an Android application. The system allows members to perform basic library functions like adding books and members, updating information, searching, generating ID cards, and booking books online. It aims to eliminate paper-based processes, manage data more efficiently, and provide a user-friendly interface. The project was implemented with technologies like PHP, JavaScript, MySQL, HTML, CSS, and Android. It has functions for users, staff, and administrators and its design includes entity relationship and data flow diagrams. Future enhancements could include barcode technology, e-book reading, and facial recognition.