By analysis of documents and materials, exemplification, and fusion analysis, this paper analyzed the effects of hosting large scale sports events on urban development. The effects include: boosting the host city' s economy vitality; raising the opportanities of employment; enhancing the development of urban tourism and the construction of infrastructure; improving the host city's environment, its citizens' psychic income and its international reputation; as well as the quality of human capital. Moreover, this paper made an analysis on the questions suc...