Ecosystem quality is essential for the region to explore new high-quality development methods with ecological priority and green development-oriented. Carrying out regional ecosystem service assessment can obtain the land space's ecological background characteristics, provide a base map of the status quo for the construction of ecosystem protection patterns, clarify the focus of ecosystem restoration, and provide guidance for the optimization of land space. This study concentrated on the Changting County of Fujian Province and attempted to explicitly elucidate its ecosystem services at the county, town, village, and system patch scales. Our methodology's distinctive contribution was that we coupled the ecological carrying capacity and gross ecological product approaches and set specific evaluation indicators based on regional ecological representativeness, regional biomass differences, and public willingness to pay and competence. The results showed that the ecosystem services grade conformed to the zoning rules, roughly appearing the low characteristics in the middle and high in the surroundings. Refinement of the scale made the distribution of results more heterogeneous, providing targeted suggestions for ecological restoration and space optimization. The ecosystem was relatively fragile in Changting County, with low ecological level townships accounting for as high as 38.89%. The influencing factors were diverse, among which soil erosion and forest coverage had a significant impact. Topography, human activities, and policy implementation affected the spatial distribution of ecological carrying capacity, and densely populated areas with flat terrain were concentrated areas with low ecological carrying capacity. Forest ecosystems value was the dominant part of the gross ecological product in Changting County. The forest ecosystem area accounted for more than 89% in the four townships with extremely high average gross ecological product level. The methodology applied in the study could help promote the application and practice of the "two mountains" theory. Our findings will provide recommendations on regional ecosystem services function improvement and spatial development.