Tourism resources are the foundation of tourism existing and developing. Its quantity and property may decide the dimension and characteristics of the tourism. It may impact tourism sustainable development if the rate of the tourism resources consumption goes beyond the renewable rate of the nature and artificiality. It is highly necessary to moderate explore the tourism resources. Therefore, on the basis of the discussion about the processes of the tourism products' exploitation, which should be pass through the following circulative phases: the products' originality, the products' design, the projects choice, the feasibility analysis, the test-market, the production and such, it expounds the meaning of the tourism resources moderate exploitation and its necessity. It includes following three aspects. First, do not overload the tourism products in order to reduce the consumption of the developed tourism resources as far as possible; Second, do not expand the tourism produces beyond the renewable ability of the relevant tourism resources so as not to use up the developed tourism resources; Third, to make an effect to excavate the invisible tourism resources in order to raise the capacity of the tourism resources. From this, in order to measure the intensity of tourism resources exploitation, it is important to have measurement that are gained by deciding the suitable tourist capacity permitted by the tourism products, which decides the maximum capacity of the tourism resources. We can also find out various subjective and objective limit factors, such as the rate of the nature resources consumption, the environmental quality standard not to impair one's health, the tourist psychological factors, and the stay time which the tourists' willing to stay for, and so on. It thereby stipulates the exploiting amount of subsidiary resources, and should be ensured by the relevant tourism management measure.