Phase transition encapsulation boxes were embedded in the bag wall. The heating was realized by providing intermittent heating style of the bag wall under normal use. The process of temperature change in the bag wall was determined by the TRM WD120 temperature measurement system and Testo875 2i thermal imaging system. The influence of the numbers of boxes, the numbers of copper meshes in the boxes and the heating time on the thermoregulation and thermal storage were studied in the research. Results indicated that the increasing numbers of phase transition encapsulation boxes and the prolongation of the heating time can increase the energy absorption, thus slow down the rise of temperature. As heating was stopped, heat release by the growing numbers of phase transition encapsulation boxes increases, therefore the temperature declines slowly. Meanwhile, temperature platform above 20℃ is prolonged. Therefore, the comfort and heating efficiency of the indoor environment are improved. And the amount of temperature rise is improved.