To enhance the energy efficiency of a cremation system by generating power using the thermal energy of exhaust gas generated in a cremation furnace and supplying the generated power to devices constituting the cremation system. A cremation system has an exhaust gas/warm water heat exchanger (21) which exchanges the heat of exhaust gas from a re-combustion furnace with the heat of a medium, and a buffer tank (215A) and flow rate regulating valves (212A, 212B) for suppressing temperature changes of the medium. A medium turbine (24) is driven by an evaporator (23) which generates working medium steam by heating and evaporating a low-boiling working medium with the heat of the medium, and power is generated by a power generator (25). A buffer tank (215B) is further provided to suppress temperature changes of the medium flowing from the evaporator (23) into the exhaust gas/warm water heat exchanger (21). A power control device supplies the generated power to devices constituting the cremation system, while covering any shortfall in power required by the devices with power from an external power source.