The Bicol University Extension Service was once operated under the banner of the "social service station" of the Office of the President through the BU Public Affairs Office in 1970.   Out-of school activities of the students and the community extension services undertaken by the faculty and the administrative staff members were in the form of training programs, information campaign program through publications, radio, agro-industrial exhibits, and staff support to various agencies.

In 1977, the Public Affairs Office was institutionalized into the Extension Service Center with five major areas specific to public information, training for non-degree requirements, specialist support, action cum research and extension   all geared to the actual needs and requirements of the Bicol Region. In the seventies and eighties, The BU Extension Service Center was the voice of Bicol University through broadcast media on information and agricultural development.   Farmers and rural folks in the communities were informed through a radio program aired over several Radio stations at 5-6 in the morning dubbed as "Bicol University on Air" hosted by Mr. Ramon Salire, its first Director.

The conduct of workshops and seminars as well as short term skills training was a popular mode of extension delivery used. Experts from the different units of the University were tapped to discuss useful and simplified technologies in developing indigenous resources needed by the clients to improve their socio-economic conditions. Audio visual presentations were also the windows in showcasing the University's achievements, projects, programs and aspirations.

During the nineties, BUESC evolved as a more visible entity in the University. The organizational structure was put into place, policies were instituted and extension components were enhanced. Communication with the greater number of clientele was reached through radio broadcasts and was enhanced through the Info-Packaging Section. Newsletters and information materials on different technologies developed by the University were the Center's information media. The Center also took the lead in hosting national convention in extension.

In the late nineties, more responsive extension programs were established covering the nearby provinces of Albay.   Various programs such as the Municipal Science and Technology Advisory Program (MSTAP), Barangay Integrated Development Approach for Nutrition Improvement (BIDANI) where the University was the lead regional network, and the Consultancy on Agricultural Productivity Enhancement Program (CAPE) in selected areas of Albay and Masbate implemented in partnership with non-government organizations and UP at Los Banos Laguna. BIDANI was recognized as an Extension program of BU through Resolution No. 20, series 1998.   The interaction of research findings with extension transfer of technology was given attention. Innovations came along with evolved experiences in community outreach. In 1999, a new program tagged as Linking for Education to Accelerate Literacy (LEAL) in partnership with the Department of Education was introduced.   It implemented the acceleration and equivalency-alternative learning program in the Municipalities of Sta. Magdalena, Casiguran and Gubat, all of Sorsogon. The LEAL program named the University as the "Best Literacy   Implementor" in the Province of Sorsogon.