It is the main public high school and largest in Maha Sarakham Province, located around the central main town district or Amphoe Muang.

The school admits Mathayom levels 1 to 6 (Grades 7-12).

It started in 1906 as a school for boys in the Positaram temple, then later was established as a formal coeducational school on July 10, 1913.

The school gradually grew larger through the years and has now over 3,000 students.

[1] The school has specialized programs for students such as the English Program (EP), with various subjects taught in the English Language by foreign teachers, Thai subjects, and a Gifted Program, which focuses on Math and Science subjects taught in Thai.