This study presents the Development of the CDSGA Online Inquiry and Library Assistance System. The main objective of the system is to provide an Online Inquiry and Library Assistance System for College, exclusively for those enrolled at Colegio de San Gabriel Arcangel (CDSGA). The system addresses the need for a safe, accessible, and student-appropriate digital learning environment by integrating borrowing and returning books. The Library System aims to support students' learning and research needs while allowing parents, teachers, librarians, and administrators to effectively monitor library usage, resource access, and user activity.