Singapore faced the problem of insufficient economic driving force after the 1990s. In order to overcome its limited land and resource problems，the Singapore government listed tourism industry as the development focus and hoped to develop comprehensive tourism industry including tourism，dining and shopping，and create more employment opportunities with the driving force of gaming industry. The Singapore government drew on the experience of Las Vegas and Macao in the course of the opening of gaming industry and made a plan for its development of gaming industry. Singapore’s opening of gaming industry did not focus on establishing new casinos but emphasized the tourism resorts establishment in order to avoid the over-influence of gaming industry. In this way，the economic development will not be unbalanced. The study creates simultaneous equations and finds that Singapore’s gaming revenue had significant negative relationship with its GDP，which indicates that Singapore’s economic development does not depend on its gaming industry. Singapore’s gaming industry does not have positive relationship with its economic development as expected. Instead，Singapore’s tourism industry has positive relationship with its economic development.