This paper analyzes the cultural tourism resources of Hainan Province from both qualitative and quantitative perspectives. There are two types of cultural tourism resources: landscape cultural tourism resources and social humanities tourism resources. Based on the input-output theory and input elements such as labor and capital in the production function, combined with the principles of scientific, systematic, and availability of index selection, an evaluation index system for the utilization efficiency of cultural tourism resources in Hainan Province is constructed. The entropy value method is used to determine the weights of Hainan Province’s cultural tourism resources, and the comprehensive scores of Hainan Province’s cultural tourism cities and counties are calculated and taken as the endowment value of tourism resources. With the advantage of the DEA method, the cultural tourism resources of Hainan Province are further measured using the DEA method with the Malmquist index model. The input indicators for Hainan Province’s cultural tourism resources are infrastructure input (23.54%), cultural resources (21.05%), labor input (19.88%), capital input (19.84%), and information technology support (15.69%). In terms of the overall mean value of the IT efficiency measurement for the tourism industry in Sanya, the IT efficiency of all cities and counties fluctuates between 0.85 and 1, with insignificant differences. During the measurement period, the maximum value appeared in 2017 and 2022, indicating that the information technology conditions and management level of Sanya’s tourism industry are in an optimal state in general during this period.