The purpose of this study was to identify the successful and unsuccessful factors for Asian cities when bidding international sport events in recently Asian region. It was to provide an important reference for Taipei and other cities in bidding mega international sport event. Content analysis method was used to explore the successful and unsuccessful bidding document for the 2008 Olympic Games, in order to find the objective impact factors. Besides, In-depth interviews were conducted with higher ranking officers who have a great understanding in event bidding. The results were as follows: First, Beijing got total of 7 negative comments, 74 fair statements and 63 positive comments of the evaluation report which included 18 indicators and 54 sub-indicators in 2008 Olympic Games bidding second phase evaluation report, and finally made the successful bidding. It meant the successful bidding factor of 2008 Olympic Games was that Beijing had good preparation and to get the positive evaluation from IOC. On the other hand, Osaka didn't have enough preparation in bidding project and led failure. Secondly, the Beijing 2008 Olympic Games, Taipei 2009 Deaflympics, Guangzhou 2010 Asian Games and Incheon 2014 Asian Games, with its successful bidding to host the mutual reasons included: (a) good international relationship; (b) a good bidding project; (c) civil society, corporations and government's strongly support; (d) to get support from the members who can vote to decide the event bidding; (e) the well development of the city.