The agricultural production function of natives' reserve will decline after entering the World Trade Organization. As the gevernment has been trying to fing a new way out for Ttaiwan's agriculturem, it is necessary to have a new interpretation for the function of the native's reserves. This study selected the Bakulas natives' reserve in Nantou Country as the study area, and took the residents of Taichung City as the respondents for a questionnaire survey to collect data for analyzing the potential market of ecotourism development on natives's reserve. The purpose of this research was based on the idea of ecotourism development to analyze ist potential market. Ecotourism considers the importance of recreation by　①Protecting of natural resource and landscape ②Respecting of local culture and life ③Benefiting from ecotourism used to protect resources and maintain life. The results to and given their amounts of willingness to pay to 14 assumed activities at Bakulas reserve in Nantou Country, which means that a potential market primarily exist. When the 14 simulated activities were arranged into a 2-day trip program for potential ecotourists who were asked about their willingness to pay for the trip. The average was 92% and amount was approximately NT$2,000.00 per trip. Based on the analyses of the surveyed data, the fersibility of the deevlopment of ecotourism in the natives' reserves, could serve as another kind of valuable outdoor recreation activity.