Island tourism has developed many years in the world. However, development of island tourism is not maturity in Penghu. Hence, it is important to refer the trends of global islands for Penghu to develop. In the research, the method of literature review was utilized to discuss the issues of global islands. There were trends, problems and how to deal. Through discussing those problems, strategies of island tourism developing were realized. The research suggested three strategies. There are business investment, developing wind resources and creating tourism attractions. Those strategies may be help tourism development for Penghu in the future.