The purpose of this research is to explore the improvement of company's performance while comply the high qualified SkyTeam membership requirements. This research also explores the networking impact that company able to obtain, and improvement of integrated ground service that SkyTeam offers to passenger. Research method that used in this research is qualitative method with case study approach. Data sources in this research are primary data, by doing interview with Alliance and Partnership Management and Ground Service Unit from PT Garuda Indonesia, and secondary data from company's documents, and news update which is related to the research theme. The result shows that joining Garuda Indonesia to SkyTeam improve company's performance in terms of passenger service system, quality of safety, human capital skills, brand recognition, and knowledge transfer process. Further, SkyTeam provide new potential market for Garuda Indonesia to Greater China, America, Europe, and Middle East. The integrated ground service that SkyTeam offers also increase the customer satisfaction index for Garuda Indonesia service. Besides that, Garuda Indonesia also faces some obstacles to adjust the high modern passenger service system, ground service officer which lack of SkyTeam product knowledge, and implementation of SkyTransfer which adjust the airport infrastructure and facility.