The fourth generation mobile communication protocol - WiMAX, has created a superior platform in range, speed, and stability. With that said, application of WiMAX in mobile tourism is definitely feasible, if not inevitable. In this study, created on the foundation of TPB, the entire study is based on the “WiMAX mobile tourist service model”. By employing the model, this study is designed to assess the tourists' intention to integrate WiMAX into a part of their traveling experience, and whether such intention will eventually be transformed into the actual purchase of the service, creating perceived value. In this study collected 1018 surveys from High Speed Rail users in Taiwan, and concluded with three major findings. First, it is discovered that aside from those customers who have long been seeking better mobile service, there is a substantial unexplored market composed of people who have never used mobile service; together, they represent 'a huge business opportunity. Second, as a regression prediction, with the intention to maximize the perceived value, the optimal state of the model is achieved by carefully invest in three critical factors: attitude, perceived behavioral control, and tourism functionality.In brief, the study indicates that the tourism industry in Taiwan as a whole is moving towards higher mobility, and such conclusion may serve as a valuable guide for the future of WiMAX and that of the tourism industry.