The Science Society of Thailand under the Patronage of His Majesty the King (SST) was established in 1948, located in Faculty of Science, Chulalongkorn University in Bangkok till now. The SST has played the leading role in the development of science and technology in the country. The society has initiated many novel activities and is instrumental in establishing several foundations and some organizations to support activities in science and technology, and still works closely with them. Now, the SST engages in a wide spectrum of activities, which stimulate public awareness of science, improve science teaching at schools, and enhances research and scientific excellence.

Main activities include:

1. Publishing a bi-monthly science magazine (in Thai) for its members and schools since 1948.
2. Organizing the national conference on science and technology of Thailand annually since 1971, renamed it to be the International Congress on Science, Technology and Technology-based Innovation in 2020.
3. Publishing the quarterly Journal of Science Society of Thailand (in English) since 1975, then renamed to ScienceAsia in 2001.
4. Organizing annually the nationwide activities for youths and children, during the National Science Week in August since 1982. These activities include competitions and contests of various kinds, the highlight of which is the science project/innovation competitions at all levels, from primary education to higher education, including technical/vocational education. This is due to the initiation of the STT to proclaim for King Mongkut (Rama IV) as the Father of Thai Science and the date August 18th as National Science Day, to commemorate King Rama IV who on August 18, 1868, accurately calculated the occurrence of a full solar eclipse at Wagor District, Prachuabkirikhan Province.
5. Initiating the Outstanding Scientist awards, Senior Scientist award, and Outstanding Science Teachers in 1982.
6. Participating in the International Mathematics and Science Olympiad since 1989.
7. Arranging annually the Science camps and junior scientist clubs (junior entomologists, junior ornithologists, etc.) to help nurture young talented students through scientific enrichment, leadership and development of innovation.
8. Recognizing the outstanding undergraduate research projects in every scientific disciplines and curriculum of all universities in Thailand, by rewarding them Gold, Silver or Bronze medals of the Young Rising Stars of Science Award, starting this program in 2020.
9. Having international cooperation with the Association of Academies and Societies of Sciences in Asia (AASSA) and the Science Council of Asia (SCA).