The city of Incheon has selected Deokjeok-do Island as a zero-carbon demonstration area using only renewable energy for promotion of Deokjeok-do Eco-Island project. Deokjeok-do Island boasts of having rich ecological resources as well as cultural ones, and attracts many tourists to the island. However, Deokjeok-do Eco-Island project has its limits in building housing and infrastructure with the use of renewable energy. In this regard, there is a need to propose a policy for sustainable tourism through a linkage of Deokjeok-do Eco-Island project with the island's tourism industry. For environmentally sustainable tourism, it is necessary to build a Deokjeok-do Eco-Island experience center and develop eco-friendly tourism programs for the prevention of the ecosystem in principle. For economically sustainable tourism, the city should operate an electric bicycle rental business and fair travel agencies based on the efficiency of local economy. For socially sustainable tourism, it needs to operate the consultative council of local residents and establish a public-private-academic network based on the equity of the community.