The team, made up of eight secondary school students, picked up a gold, two silver and three bronze medals, as well as two honourable mentions, at the annual competition which began on Aug 16 in Changhua.
The event ended on Sunday.
The competition attracted nine participating countries made up of China, Hong Kong, Taiwan and the other six from Southeast Asia.
Nut Sothanapan from Srinakharinwirot University's Pathumwan Demonstration School, won the gold.
Silver medals went to two students from Suankularb Wittayalai School, Jetsada Podapon and Pakapark Bhumiwat.
The three bronze medals went to students from Samsen Wittayalai and Srinakharinwirot University's Pathumwan and Chulalongkorn University's demonstration school.
A student each from Assumption College Lampang and Suankularb Wittayalai Nonthaburi School received honourable mentions at the event.
Education Minister Chinnaworn Boonyakiat yesterday accompanied a group of 50 students who have recently won more than a dozen gold and many other medals at international olympiads in mathematics, physics, chemistry, biology and informatics on a visit to meet Prime Minister Abhisit Vejjajiva at the parliament.
Mr Abhisit extended his congratulations to the students for their success and for the honour they have bestowed on the country.
He said most high school students who were good at maths and science were expected to further their studies in the medical field. This was contributing to the country's shortage of research staff.
