The clinical efficacy of Huangqi Jianzhong Decoction in the treatment of chronic non-atrophic gastritis (CNAG) is observed, and the feasibility of using infrared thermal imaging technology to evaluate the clinical efficacy of CNAG is discussed. 76 CNAG patients with deficiency-cold type of spleen and stomach are divided into control group (treated with western medicine) and treatment group (treated with Huangqi Jianzhong decoction), and the changes of symptom scores and infrared temperatures of the observation sites are observed before and after treatment in the two groups. The results show that the total effective rate of the treatment group is 94.4%, while the total effective rate of the control group is 77.8%（P<0.05）. The infrared temperatures of observation sites in 2 groups are higher than that before the treatment (P<0.05), and the infrared temperature increasement of observation site in treatment group is larger than that in control group（P<0.05）.Therefore, Huangqi Jianzhong decoction has a good therapeutic effect on CNAG, which is worthy of study and promotion. Infrared thermal imaging technology can reflect the change of curative effect in time, objectively and conveniently and can compare the curative effect, which provides objective and visual basis for dialectical treatment of traditional Chinese medicine.