This study was to evaluate the performance of slow city tourism development as it was perceived by local residents and tourists. Data were collected from 328 visitors and 178 residents of Jeungdo, the first chittaslow city in Asia and Korea, on July 2009. Results from empirical investigation showed that tourism development based on slowcity concept in Jeungdo has not much decreased negative socio-cultural impact, while it has contributed a little to the changes of recognition on the economic effects. Results also indicated that there was a significant difference between residents and tourists on their evaluation of environmental impacts of Jeungdo slowcity tourism development. This suggests that it might create conflicts for Jeungdo tourism development in the future. Policy implications and limitation of the study were also discussed.