Medical infrared thermal imaging technology has played an important role in the theoretical system of "treatment of disease" in traditional Chinese medicine (TCM). It can predict the risk of disease in advance and realize early intervention and early treatment. Medical infrared thermal imaging technology runs through the three processes of preventing disease onset, preventing disease from exacerbating and preventing reoccur after recovery in the "treatment of disease" of TCM. It plays an auxiliary role in TCM constitution identification, TCM diagnosis, syndrome analysis and efficacy evaluation. The application of medical infrared thermal imaging technology in the idea of "treating the disease" in Chinese medicineis is dicussed, aiming to further improve the diagnostic methods of Chinese medicine, intervene early, block all sources of disease development, and achieve the goal of less illness and no disease. The result will benefit the people.