The origin studies a main purpose is understand National Chin-Yi University of Technology student participate in happy joy baseball motive and inquire into student's participation to enjoy joy baseball exercise in the meantime of motive why. Researcher with is the tool of data collections from” university the student participate in happy joy baseball exercise the inquisition questionnaire of the motive” of the plait. With student's participation happy joy baseball exercise be used as the object of this research. Include the data analysis method used: Describe sex covariance and t to examine and order two serieses related examinations, factor analysis, notable level it affirm, all with the α be worth=.05 is standard. Be inquired into by analysis, or result as follows: National Chin-Yi University of Technology student participate in the motive of happy joy baseball exercise to take” social need” as the highest, secondly is ”achievement need”, again secondly is” healthy need”, lowest is” sense need”.