To provide a thermobattery system of cold/hot air device which reconverts a part of the quantity of heat being heat-accumulated or cold- accumulated by Peltier element into electric energy and is driven by thermobattery and can operate without needing power for a certain time.

A thermobattery system of cold/hot air device is equipped with a Peltier element, a current control means which controls the current to be applied to the Peltier element, a regenerative vessel 1 (1) which is provided so that the heat may be conducted from the heat radiative face of the Peltier element, a regenerative vessel 2 (6) which is provided to conduct heat to a heat absorptive face, a thermoelectromotive force part which is provided to conduct the different quantities of heat in the regenerative vessel 1 (1) and the regenerative vessel 2 (6) individually to the two heat receiving faces of a Seebeck element, and a heat exchanger (2) which has a blast means being driven with the power source of thermoelectromotive force, and this device can operate by the thermoelectromotive force by the temperature difference between the regenerative vessel 1 (1) and the regenerative vessel 2 (6). By this matter, it follows that this device does not consume power excepting the time of heat accumulation of a thermobattery.