Abstract：In this paper, the heat storage and release properties of an active phase-change thermal storage device have been tested under different working voltage and exhaust heat temperature. The experimental results show that: different working voltage and exhaust heat temperature make great difference on the time and efficiency of thermal storage/release. Under higher voltage and exhaust heat temperature, the time that the device needs to store heat is short. The increased working voltage can enlarge the temperature difference between the hot and cold sides of semiconductor chips, and then reduce the heating coefficient. Compared to passive phase-change thermal storage devices, the biggest advantage of the device is the adjustability of working voltage. Therefore, much higher heat storage/release properties can be assured by adjusting working voltage within a reasonable range. At the same time, the device overcame the mismatch of thermal energy supply and demand sides on time, place and intensity in the process of recycling low-temperature waste heat, which cannot be improved by passive phase-change thermal storage devices.