Abstract: Extracting geothermal energy from abandoned mine water(EGEAMW) is recognized as a critical strategy for effectively utilizing renewable energy resources in former mining areas. It can not only achieve the goal of carbon peaking and carbon neutrality, but also facilitate a newly green energy system. EGEAMW is often required to reactivate the closed shaft and roadway systems. However, there are no specialized safety technical standards for restarting abandoned mines. To address these challenges, the case of the abandoned Mentougou mine in Beijing, where a mine-water-based heat pump system has been used for 14 years, is examined. It is found that hydrogeological condition of the mining area is different from that of the plain area, which can demonstrate the feasibility of applying a closed-loop heat extraction system. Furthermore, following the experience of the case of DaiZhuang Mine in Shandong Province, the necessity of pre-deployment of critical infrastructure prior to mine closure is highlighted. It is suggested that adopting a scientific research-driven project is free from approvals from multi-governmental departments. The promotion of joint approval among multiple governmental departments to improve administrative efficiency is further recommended, and systematic investigation and evaluation of residual renewable energy in abandoned mines are also proposed. These efforts can provide a scientific basis for future targeted policies and precise regulatory management.