It is of great importance to study the manifestations and the influencing factors of the time-related changes of infrared thermal images (ITI) of human body since the variable body surface temperature distribution seriously affected the application of ITI in medicine. To explore the changes of ITI of human body in different seasons, a trial was carried out to study the skin temperature distribution of vertical and horizontal direction of the human body in winner and spring. The results showed that the temperature differences between upper and lower, left and right of the body in spring were greater than those in winter. Shengsheng capsule, one of the traditional Chinese medicine health food with immunity adjustment function, could influence the skin temperature distribution. Since the seasonal changes of human body could be reflected objectively by ITI, there are bright prospects for the application of ITI in medicine.