The Theravada Buddhism was introduced in mid 14^th century by Cambodia, it was known as the state religion in 20^th century when upsurge of Laos national liberation movement. The Buddhism appeared Laos there again, therefore, they have set up a unified national Buddhist organization. Later, they have collected and published a Liu Wen Pali Tipitaka book and returned to the main temple of Pali teaching centre. This temple was reference to the ancient Buddhist temple built in Laos.