After the Kaohsiung City government positioned the city as an oceanic capital, Cijin has been listed as an important focus of tourism development. This study developed a model to evaluate the potential of creating sustainable development of marine tourism in Cijin and designed the evaluation criteria according to expert interviews, related studies, and the planning reports of Cijin. The criteria were composed of 5 constructs, including attraction of oceanic resources, basic resources, market potential, integrated development of tourism, and values created for customer, and 25 sub criteria. This research adopted Analytic Hierarchy Process (AHP) to derive the weight of each main criterion and sub criterion proposed by experts. Further, Fuzzy Aggregation Operator was used to estimate the average weight of each criterion. In this algorithm, the average strength and consensus were simultaneously considered. The research findings showed that among the main criteria, "values created for customers" was most emphasized by experts, followed by "attraction of oceanic resources", "integrated development of tourism", "basic resources", and "market potential". Among the sub-criteria, "local history and culture" in "attraction of oceanic resources" was most valued. In terms of "basic environmental resources", "development of public lands" had a relatively higher weight. In "market potential", "recreation at night" had the highest weight. In "integrated development of tourism", "community creativity" and "integrated development of resources" showed higher weights. Finally, in "values created for customers", "customer's experience" was the factor most paid attention to by experts. The research results could serve as a reference for the authorities concerned to develop Cijin area as an oceanic tourist location, and the proposed evaluation model for development potential could also be useful for follow-up studies.