Cambodia has enjoyed the benefit of Angkor Wat. For hundreds years、 this building has being used as a religious institution、 but now it is a tourist spot that attracts so many visitors. Ticket sales to Angkor Archeological Park reached 2.2 million、 generating over $99 million. Total revenue from international tourism that year was $4.92 billion、 contributing 12.1％ to the country’s GDP. The ratio of international tourism income to GDP in Cambodia is very high. Comparing the ratio of international tourism income to GDP among countries in the ASEAN region. Cambodia has by far the highest ratio at 14.9％.