The purposes of this study were to compare tourists' choice behaviors of different ecotourism sites. The results were summarized as followed: 1. There is no significant difference between the tourists' choice behavior in Yangmingshan National Park and Manyuehyuan Forest Recreation Area. 2. The tourists were segmented into three different groups: resource sensitive group, price sensitive group and crowding sensitive group. 3. The resource sensitive group differed significantly from the price sensitive group and the crowding sensitive group in the importance they placed on natural-cultural landscape resources, crowding perception and total cost of the trip. They valued natural-cultural landscape resources, less crowded perception and interpretation more, and they were considered as a potential ecotourist.