Since 1990, Asia was the fastest-rising market of global airline transportation in an area. Due to the demand of airline passenger and the volume of freight transportation in this area have increased apparently and also have potential demand, so a lot of Asian countries have followed to open up the new airport or have enlarged the existing facilities incessantly to meet this trend, and they always look forward to becoming the main international pivot airport in the area by these efforts. For the reason to response the trend of environmental changes and to impel the improvement of the airport¡¦s competitiveness, the Legislative Organization of Republic of China had approved ¡§The regulations of International airport garden¡¦s development ¡§at 2009. By this process, it has encouraged the competitiveness of the airport to become an important topic in Taiwan, and has also opened the Taiwanese's cognition about the competition of International airport. The purpose of this research includes: First, try to build up and construct the assessment index which can influence airport competitiveness and index weight via the arrangement of numerous literatures. Second, analyze the assessment project of the urban competitiveness to find out about the relation among the airport and urban competitiveness. Third, draft the basis of the development tactics for the Kaohsiung International airport by comparing the diversity of competitiveness in all respects among Kaohsiung International airport, Taipei airport and Xiamen airport. This research uses the study mode of professional questionnaires, and chooses government officials that have the background of management for air transportation and city development, scholar or airport users to fill out the questionnaire. By the way, this research by the analytical method of Analytic Hierarchy Process,¡]AHP¡^, can calculate each composition in structural frame and weight value of index, and then utilize the simple weighting method to compare the diversity of airport competitiveness among Kaohsiung, Taipei and Xiamen. We find that via the result of this study: First, in the aspect of building the evaluated index in airport competitiveness: The" safety "' is the most important item for assessing airport competitiveness, secondly in order is" management"',"' service ", "space" and "installations". However, the "demand" is the lowest important item that influences the airport competitiveness. Second, in analyzing the relation among competitiveness of airport and urban: There are the difference between main assessment and emphasized items for urban and airport competitiveness, but there are the relevance among the subsidiary index items of assessment. This demonstrates that between airport and urban competitiveness still has the characteristic to promote competitiveness each other. Third, in the aspect of carrying on the positive analysis to Kaohsiung, Taipei and Xiamen airport to draft the development tactics: (1) By the analysis of scenario analysis for the airport competitiveness among the Kaohsiung, Taipei and Xiamen airport, can find that the most competitiveness airport is Xiamen airport at the present stage. Moreover, the competitiveness for Kaohsiung airport is between Xiamen and Taipei airport in this competitiveness analysis result. (2) To improve the airport competitiveness of Kaohsiung, it can be achieved by strengthening it in the position of pivot traffic, improving the transport facilities, outside traffic and service of the airport, setting up logistics and Convention and Exhibition Center, strengthening marketing tactics, improving the political environment, cooperating with the tourism policy of country, strengthening relevant industries etc..