Tourist excreta treatment in High Mountain area in Taiwan brought more attention recently as mountain hiking and sight seeing tour become popular. The Yushan National Park is one of the most popular tourist sites in Taiwan. Crowded visitors, freezing temperature and insufficient water supply, so the traditional flushing toilet can’t be used in this trail. To solve this problem, Center for Environmental, Safety and Health Technology of Industrial Technology Research Institute (CESH/ITRI) was invited to design an adequate bio- toilet for tourist excreta treatment. There is no electric power, water supply and vehicle can not reach in this site, so the power for ventilation and lighting was supplied by solar power system, rainwater was collected for house cleaning. These two dry toilets have been finished construction and start operation Since Dec.2003. This is the first bio-toilet in Taiwan, the efficiency of the toilet will be monitored to testify the system is an idea process in high mountain area.