Thailand has been ranked as one of thetop ten tourism destinationsin the world，and receives themost overseas tourists among ASEAN countries. With the rapid development of Thailand's tourism industry，the market structure of tourism has undergone a great changes，but it also faces fierce competition from other ASEAN countries. This paper uses theories of international competitiveness and tourism locationto explain the development of the tourism industry and analyze the main measures of promoting the development of Thailand tourism industry，and alsoputs forward some countermeasures and suggestions to further promote the development of the tourism industry in Thailand.