Objective Based on the infrared thermal imaging technology, this study discusses the effect of the "Enhancing Zheng and Warming Yang Method" on yang deficiency, discusses the common law of the infrared heat maps of patients with yang deficiency, and analyzes and judges the effect of enhancing zheng and warming yang method in intervening yang deficiency patients. Methods Thirty patients with yang-deficiency constitution were treated with medicines to benefit temperature and yang in Dazhui, Shenshu (both acupoints), Mingmen, etc. to apply acupoint application. Infrared thermal imaging technology was used to measure the Governor Vessel, waist, abdomen, hands and feet before and after the intervention. Results The temperature of the Governor Vessel, waist, abdomen, hands, feet of people with yang deficiency increased after intervention. The results suggested that the local temperature of yang-deficient people was improved. Conclusion This study found that the "Warm Yang Method" can induce the phenomenon of heat conduction along the meridian, and regulate heat metabolism to regulate the constitution of yang deficiency. Infrared thermal imaging technology can be used to assist in evaluating the therapeutic effect of yang deficiency and provide clinical guidance for the formulation of yang deficiency.