In Korea, there would be a growing demand for new stadiums which might require government to spend public fund. It, however, is not good idea to follow foreign country models without close examination. Professional sports started in U.S.A around 1869 and professional sports became part of American life and have developed unique culture of American. American communities have not always subsidized the professional sports industry. To the contrary, for the first seventy-five years of professional sports, most team owners built their own facilities and covered their own costs. By the end of World War II, however, changing demographics led to the start of communities subsidizing professional sports teams. Since 1950s, many local communities continue to engage in inequitable partnerships because professional sports leagues have monopoly power over the number of franchises in their sport. This monopoly power gives teams the control to switch host communities almost at will, as well as the clout to credibly threaten to switch host communities if a current host fails to meet that team s subsidy demand. The current relationship between professional sports teams and American communities needs to change. The unique structure of professional sports leagues, as well as the American government s historic hands-off approach to regulating the sports industry, has allowed America s four premier professional sports leagues to exploit their monopoly power in the market for sports franchises. As a result, professional sports teams have garnered billions of dollars in local subsidies. Governments would otherwise spend these dollars to improve public welfare. Professional sports leagues have enjoyed a long-standing positive relationship with the American community. Sports subsidies, however, are a relatively new phenomenon that is detracting from this relationship. Because subsidized professional sports teams hurt public welfare, as well as encourage the inefficient operation of sports teams, a bill preventing sports teams from accepting public subsidies is an important step toward curbing professional sports bargaining power vis-à-vis the American community. Placing the professional sports industry back on equal footing with America s local communities would restore an important balance between professional sports and American society. By restoring this balance, American communities would once again become able to enjoy the benefits of professional sports without needing to subsidize the costs of an already profitable industry. In Korea, there are not so many sports fans who eager to spend their mony in professional sports and all professional sports teams are part of giant business conglomerate. Because of this reason, professional sports team have to make effort to improve their financial condition through new marketing strategy which have used by American professional teams without public subsidy and professional teams have to pay attention to mother company s social responsibility.