In the present invention, electric power is generated by using the thermal energy of an exhaust gas generated in a crematory, and the generated electric power is supplied to each apparatus constituting a cremation system in order to improve energy efficiency. The cremation system has an exhaust gas/warm water heat exchanger (21) for exchanging the heat of an exhaust gas from a recombustion furnace with a medium, a buffer tank (215A) for inhibiting a temperature change of the medium, and a flow rate adjustment valve (212A, 212B). Further, an evaporator (23) to generate a working medium steam by heating and evaporating a low boiling point working medium with the heat of the medium is used to drive a medium turbine (24) to generate electric power using a power generator (25). Further, a buffer tank (215B) is provided in order to inhibit the temperature change of the medium flowing from the evaporator (23) into the exhaust gas/warm water heat exchanger (21). Also, a power control device supplies, to each apparatus constituting the cremation system, the generated power and a shortage for the power needed by each apparatus from an external power source.