Thailand has been a democratic constitutional monarchy since 1932. Under the present constitution, the parliament is composed of 270 appointed senators and 360 elected representatives. The Prime Minister is selected from among the members of the House of Representatives.

According to the constitution, the King exercises his legislative power through the National assembly, his executive power through the Council of Ministers and judicial power through the Courts of Law.

The central administration is under the responsibility of 15 Ministries as follows:

1. Office of the Prime Minister

2. Ministry of Agriculture and Co-operatives

3. Ministry of Commerce

4. Ministry of Communications

5. Ministry of Defence

6. Ministry of Education

7. Ministry of Finance

8. Ministry of Foreign Affairs

9. Ministry of Industry

10. Ministry of Interior

11. Ministry of Justice

12. Ministry of Public Health

13. Ministry of Science, Technology and Energy

14. Ministry of University Affairs

15. Ministry of Labour and Social Welfare

Thailand has 76 provinces, each administered by governor, each province is sub-divided into districts, sub-districts and villages. The governors of 75 provinces (except Bangkok) are appointed and controlled by the Ministry of Interior. The governor of Bangkok is elected in four - year time.