The study is has been studied how the public relations affect the customers/users of sports center, in the changing function of sport center from enhancing the role of the public health to building community-relationship. To achieve this purpose, the survey has been taken for the customers who were using the sports center in Busan at times of July 2010. The data has been taken three hundreds and seventy-seven customers (Male:122, Female: 255) and the outcome is driven by the analysis via operating SPSS V15. First, the credibility has been noted as the first factor in building the service quality of public relations; and the respective controls follows as the second, devotion are abided by. Those are ranged 38.6% in affecting the materiality of public relationship. Second, what is affected in quality of service are respective controlling, credibility, contribution in local areas etc; and those hold accountable of 26.5%. Third, the responding impact of service quality in public relationship is estimated 50.6% and the elements are respective controlling, devotion, credibility and intimacy/familiarity. Fourth, the impact over certainty in service quality of public relationship estimates 33.4% and two factors are respective controlling and the local lady's contribution. Fifth, the sympathy in service quality of public relationship is estimated 36.1% and the elements are respective controlling, devotion, credibility and intimacy/familiarity. In sum, it is validated the what public relationship has impacted in service quality as external elements. Given aspect can be considerable in that the level of public relationship is highly likely to affect service quality of sports center. Therefore, it is reasonable that the public relationship can be considered as the priority, in which the firms establish the marketing strategies.