This study estimates the business cycle of Taiwan international tourism industry using Markov regime switching model. An analysis was applied to inbound tourists to Taiwan during the period of February 1967 to March 2011. The average duration of low growth is about 16 months while the average duration of high growth is about 3 months. This finding may provide important information for the tourism authorities and policymakers. Also, the tourism-related firms’ managers can optimize the value of their companies by applying different strategies under high growth state or low growth state. The results of this study provide useful guideposts for taking every possible advantages of the cycle study to the practitioners and researchers in the tourism.