Abstract: In this paper,a new respiratory type of fresh air device with heat recovery function was designed to reduce the building energy waste.Its process was arranged to save part of the heat energy in the exhaust gas and send it back to the room,when supplying fresh air with a heat storage device installed in the ventilation duct.Firstly,the work principle and the performance test method were introduced.Then,two kinds of situations,such as winter heating and summer cooling,were respectively simulated in a simulation room to test the temperature variation regularity of the heat storage device,heat transfer efficiency and energy saving.The experimental results show that,the ventilation of the device can reach 60 m<sup<3</sup< per hour,fresh air thermal load can be reduced about 280 W in winter and the fresh air cooling load can be reduced about 270 W in summer,its heat recovery efficiency can reach 80%.