This study was investigated the participation behavior model of sport tourists on the 2007 Sun Moon Lake Activity. 263 Subjects were invited to fill out the questionnaires for testing the structural relationships among variables of the participants' exercise experience, watching sports programs experience, the attractive of sport tourism, participation motivation, satisfaction, and participation loyalty. The results were showed: (1) The sports tourist's background variables (including sex, education level, age, area of residence) have no significant difference on participant motive, attractiveness, satisfaction, and loyalty. (2) Tour appeal of the movement, sport is it participate in motive and sport is it participate in satisfaction reach apparent to is it return to equation preface to can is it participate in loyalty predict to visit to sport to enter all to visit to visit, and this equation preface can explain participation explanation of loyalty of participant make a variation quantity 68.6% effectively. (3) The results of chi-square analyzing sport tourist think the activity carefreely to the local important degree on this bicycle activity. The result to reach apparently, in order to think' very important number of people' is the highest in proportion (52.5%), only 5 account for 2.0% for the number of people is not important, and the participant this activity is helpful to the locality. The findings provided the participation behavioral models for the sports tourists to understand. It's helpful for the sponsor to do promotion and marketing in holding kayak Marathon in Sun Moon Lake in the future.