The library is the heart of any institution. It is one of the major components of Trinity University of Asia, a Christian institution of higher learning. Trinity University of Asia Library goals and functions are closely identified with the purposes of the university to contribute to the growth and dissemination of knowledge and make its services effective to the instructional program of the university.

From June to August 1963, the General Library (College and High School) was located at the last end of the second floor of the old building (now the Guerrero Hall which houses the High School Building). High school and college library collections were jointly organized and administered under Ms. Enriqueta A. Quiocho.

Upon completion of the Science Building in November 1968, the College Library was relocated within the Western part of the building. By 1979, Ms. Victorina V. David took over as Chief Librarian.

The College Library was transferred to a new three-storey building, inaugurated on July 19, 1982, by the Honorable Michael H. Armacost, Ambassador of the United States to the Philippines. The Library was constructed through the assistance of the United States, Agency International Development, American Schools abroad plus funds from the Booth Ferris Foundation, friends and alumni. The building was named after the first Chairman of the Board of Trustees, RT. Rev. Wayland S. Mandell.

The late 90's marked the beginning of library computerization development. The CDS/ISIS, a UNESCO-free software, was first used by the Library, followed by a DOS-based integrated system of cataloging and an online catalog. The Athena library system was installed in June 2003 and used until the 1st quarter of 2022. The university library is currently using Follett Destiny Library Manager.  

Ms. Jorgia P. Credo was the Director of Libraries from 2004 to 2020, and Ms. Jennifer V. Racimo is the current Director of Libraries.