The airports in Taiwan already adapted the outsourcing or contract out concept on some part of operation, such as commercial facilities, clearing, and maintenance. However, the full airport operation is still under the CAA¡¦s control. The airport operation outsourcing will be influenced by the policy, regulations, economics, social, culture of the country, also the airport scare and operation characteristic, therefore, it is difficult to define one model to meet all airport demands. This study is using Chuhai airport operation outsourcing as a case study, to induct the key factors from different faces those are considered to influence the outsourcing project. If the airport operation in Taiwan is planned to adapt outsourcing in the future, this study may provide some reference. The conclusion of this study is the influence key factors of airport operation outsourcing should consider from three faces, the external environment, the client side and contractor side. 1.The external environment: the policy (including law and regulation) and economy condition are the most important factors. 2.The client side: The law and regulation (the authorize and restriction); the organization (the strategic planning and preparation working); the management (clear object, audit mechanisms and performance evaluation). 3.The contractor side: The law and regulation (the restriction, contract reasonable, rights and responsibilities); the economic factor (profit and company strategy); the organization (the experience and capability); the management (the authority, audit mechanisms and performance evaluation).