Abstract: A cremation system has an exhaust gas/warm water heat exchanger which exchanges the heat of exhaust gas from a re-combustion furnace with the heat of a medium, and a buffer tank and flow rate regulating valves for suppressing temperature changes of the medium. A medium turbine is driven by an evaporator 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. A buffer tank is further provided to suppress temperature changes of the medium flowing from the evaporator into the exhaust gas/warm water heat exchanger. 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.