From the survey of those tourists from 4 Asian countries, the results showed that Taiwanese tourists have the least knowledge about Thailand. On the other hand, Tourists from China, Japan, and Indonesia will be more familiar about Thailand. It is also included that some of Taiwanese tourists denied to travel in Thailand with many reasons, consisting of sanitary and safety, political crisis, along with the knowledge about Thailand. All of these are the barriers to attract Taiwanese tourists to travel in Thailand. From these causes, Nielsen Company (Thailand) Limited proposed that Thai tourism marketing should be promoted to increase the perception about Thailand and stimulate tourists to come to Thailand more. Promote the valuable travel with wonderful feelings, which are the advantageous points of Thailand than Japan and USA. The country's uniqueness and also safety, trust must be shown to Taiwanese tourists (Nielsen Company (Thailand) Limited, 2012).