Since the Buddha entered Nirvana until the twelfth century, Buddhism has undergone six times to assemble Buddhist scriptures and at the time of the 7th Buddhist sutra gathering in Sri Lanka in the second half of the 12th century, exactly at the time of the home. The first Thai country was formed. Sri Lanka's Theravada Buddhism was highly influential and later spread throughout Southeast Asia, especially Burma and Thailand. The Buddhist reform and the Theravada Sri Lankan victory were the basis for the formation of the first Thai state religious practice system. Thai people later followed Sri Lanka Theravada Buddhism. For Thailand - a country that uses Theravada Buddhism as a state religion, the influence of Buddhism is inevitable. This influence is profound in all aspects of Thailand. The paper analyzes the effects of Theravada Buddhist sentient beings on the politics of Thai dynasties from the thirteenth century to the 1932 democratic networks.