To provide a heat recovery system of high-temperature exhaust.

The heat recovery system of high-temperature exhaust includes a furnace body having a combustion space, at least one combustion device and one pair of power accumulation devices, an exhaust pipe is connected to the combustion space of the furnace body, the combustion device is assembled in the vicinity of the furnace body, a heat energy recovery air blower and a heat energy recovery control valve are connected to the combustion device, the power accumulation device is assembled at the terminal end of the exhaust pipe of the furnace body and composed of a control valve, a first power accumulation tank and a second power accumulation tank, heat energy is recovered from the high-temperature exhaust discharged from the furnace body by the power accumulation device according to this heat recovery system, air for combustion is introduced when heat is fully absorbed by the heat accumulation device after discharging relatively-low temperature exhaust, and the air of room temperature is raised in temperature by the heat recovery system, introduced again into the combustion space of the furnace body, and used.