In order to evaluate the infrared camouflage effect of the target, an infrared camouflage effect evaluation method based on fusion degree is proposed, which is based on the infrared patch edge characteristics, infrared thermal image texture, temperature-color histogram and infrared spectrum characteristics of the target and background. The infrared image data of different targets at different times were obtained by carrying out the infrared characteristic test of the target and the background.The changes of the infrared fusion degree of the target and the background at different times were studied and analyzed, and the applicability of the evaluation method was verified by combining the data. The experimental results show that the calculation process is simple and intuitive, the influence of subjective factors can be eliminated, and the results are easy to analyze, which can provide the basis for camouflage assistant decision-making.