A bicycle is not only the human primary transportation tool but a new clever pattern of sport without pollution. The fanciers purchase the bicycle following the guidance such as safety and personal preference. This study was expected to explore the bike fanciers' purchasing opinions to influence by the product design elements of the bicycle in the future. The study tries to find a suitable product design of dimensions and metrics for purchasing intention by literature analysis influences. It followed by expert interviewing, then summarizing and choosing assessment criteria. AHP method is used for calculating demand and indicators of various dimensions. The complete index of design elements influence purchasing patterns willingness of the products, and finally investigate the current consumer perception questionnaire. The most value of the reference index provides bicycle designers to create the new patterns. The results of that analysis, the Kaohsiung-Pingtung area population engages the leisure activities of Bicycle respondents. The factors affect the bike purchasing for three assessment criteria following in order to "product functions", "popular elements", and "personal preference".