On 8 March 1952, the Ministry of Education created the Division of Educational Information Extension under the Department of Curriculum and Instruction Development.  Originally mandated  to advocate the value of education and to give guidance on education and careers, the Division is now known as the Centre for Educational Technology (CET).
               By virtue of the 216th Announcement of the National Executive Council Amendment Act dated 29 September 1972, the Department of Non-Formal Education was established on 24 March 1979 incorporating the Centre for Educational Technology under its jurisdiction. In the wake of a radical education reform and a major administrative change in the Ministry of Education in 2003, the Department of Non-Formal Education became the Office of the Non-Formal Education Commission (ONEC) attached to the Office of the Permanent Secretary for Education. On 4 March 2008 upon the promulgation of the Non-Formal and Informal Education Act, B.E. 2551 (2008) ONEC became known as the Office of the Non-Formal and Informal Education (ONIE). Consequently, the CET is now under the ONIE. 
               Educational broadcasting service project was launched by the Ministry of Education in 1954 to deliver new knowledge to the people as well as to promote education via the Ministry’s radio station. The programmes to be broadcast were classified into two main types: educational radio programmes which were broadcast for the first time in 1954 to provide knowledge and entertainment to the public. And school radio programmes which went on air for the first time a few years later in 1958 school-year.
               In 1979, the International Development Association (IDA), the development funding arm of the World Bank, provided credits to the Thai Government to expand the radio network aiming at nationwide coverage. Consequently, Thailand’s second radio network became operational in 1983 and has provided educational services to the people throughout the country ever since.
              Concurrent with the growth of educational radio, television as educational broadcasting medium was explored. As a result, the Thai public had its first taste of educational television programme, which was presented by the Ministry of Education, on the then Channel 4 in 1957.

               Information and communication technology advancement played a significant role in the provision of education in Thailand at the turn of the century. The Cabinet of Ministers’ approval and the government’s policy on the use of satellite for distance education brought the Ministry of Education’s distance education programme to another level. A Memorandum of Understanding between the Ministry of Education and Thaicom Foundation formalized the use of Thaicom satellite for distance education and Thailand’s first educational television via satellite was born in 1994 although official approval from the Department of Public Relations was granted only in 1999. The CET is entrusted with the operation of the Education Television Station or ETV.              

                The Internet came into the picture a few years later. With financial support from the Educational Technology for Lifelong Learning Promotion Project, CET began to webcast educational television programmes via the Internet at www.etvthai.tv in August 2005. Almost a year later came webcasting of the first radio programme at www.moeradiothai.net on 15 May 2006.
               Realizing the importance of computer in education, CET created the Educational Electronics Section, currently known as the Educational Multimedia Section, on 13 March 1998 to plan, develop and produce, and disseminate computer-assisted instructional materials. The Educational Multimedia Section now focuses on e-learning materials as well as CET’s web site development.
               In 1999, CET became the Ministry of Education’s designated lead agency for production and dissemination of educational media in various formats for people with disabilities. To realize this objective, the Educational Media for the Disabled Section was created to assume the responsibility.