Abstract: Fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. It offers advantages include cleanliness, high energy conversion efficiency and flexible arrangement. Fuel cells generate a significant amount of residual heat during operation. To ensure proper functioning, the heat must be promptly dissipated to maintain a stable stack temperature. Fuel cell combined heat and power systems recover residual heat during power generation by exchanging heat with tap water stored in an insulated water tank, significantly improving the system's energy utilization efficiency. A residual heat recovery control strategy is proposed, utilizing a designed fuzzy controller to adjust the speed of the cooling fan or the tap water pump. By reasonably switching between cooling and heat exchange modes, effective utilization of the residual heat is achieved while maintaining a stable stack temperature. A simulation experimental platform is established, capable of simulating various heat generation conditions of the fuel cell in practical applications, and utilizing a waste heat recovery system for thermal management. Testing on the simulation experimental platform validated the effectiveness of the proposed waste heat recovery control strategy.