Abstract: Underground coal mining often leads to surface subsidence and water accumulation, changes in the ecological environment, as well as in the spatial pattern of land and water resources, in high groundwater level mining areas. At present, in coal mining subsidence areas, the utilization of water resources is insufficient, and the potential for development in renewable energy, multi energy complementarity, and pumped storage in abandoned mine is huge. The spatial functions of coal mining subsidence areas need to be reconstructed. Under this background, the concept of resource utilization, energization and functionalization was proposed. The relevant scientific issues and key technologies were systematically elaborated. The former comprises the evolution laws of water resources and water ecological environment as well as the residual deformation laws of the surface in coal mining subsidence areas. The latter includes the technology of monitoring and evaluation together with the technology of treatment and utilization. And specific policy recommendations were proposed from aspects such as industrial integration, fund raising, regional coordination, and technological innovation.