This article aims to study the cause of environmental problems in Thailand, which began to be serious in the end of 1950s. This article should answer the question about the origin of the environmental problems by using historical documents. Historical facts point out that environmental problems in Thailand has something to do with the idea of how to manage the environment from the western countries in the 19th Century. The then Thai government did import the idea and method of environmental management, which laid its importance in economic advantage, from western countries like England or Denmark. This led to the eradication of the nature for economic purpose. This idea was dominant in Thailand until nowadays, since it has never been revised. The idea stays the same and didn’t follow the way of western countries (including the US), whose idea of environmental management was improved by laying weight in economic development alongside with the maintenance of the environment.
Keywords: environmental idea, environmental management, Thai history