The objective of the study was to studying the economic evaluation methods of ecosystem services in protected areas with application on Wadi Degla Protected Area, and in order to achieve the objectives of the study, an inductive approach was used in the theoretical study and the field side was prepared on two questionnaire lists directed to the sample items, which amount to 385 items from the visit of Wadi Degla protected area and 165 A member of the protected areas with application on Wadi Degla Protected Area , and statistical analysis was used to ensure the validity of the study hypotheses. The study reached the following results: Acceptance of the first hypothesis: there is a direct correlation with significant between the economic evaluation of ecosystem services and the preservation of natural resources, as the linear correlation coefficient reached 0.778 at a level of 0.01. The regression equation took the following formula:  Y1 = -1.251 + 1.281 * X+ ε Acceptance of the second hypothesis: there is direct correlation with significant significant between the economic evaluation of ecosystem services and decision-making, as the linear correlation coefficient reached the linear correlation coefficient of 0.745 at a level of 0.01 significance, and the second hypothesis was accepted. The regression equation also took the following formula: Y2 = 0.678 + 0.847 * X + ε The most important recommendations of the researcher include the following: The results showed the positive impact of the role of economic evaluation of ecosystem services in preserving natural resources and contributing to decision-making. Therefore, the researcher recommends applying the economic evaluation of ecosystem services in natural reserves by following the following: The necessity of providing training programs for the economic evaluation of ecosystem services in the protected areas, conducting an economic evaluation of the ecosystem services in the reserves, and referring to this evaluation by decision makers in taking the appropriate decision. Using appropriate expertise in conducting economic evaluation of ecosystem services in protected areas. Benchmarking the services provided in the protected areas of the Arab Republic of Egypt, and the global protected areas of distinction and quality, and adopting strategies that lead to accessing Egyptian protected area to the quality of those protected areas.