The temperature of the surface of metallurgy stove has been computed by using one-dimension steady heat transfer model. Furthermore ,the relationship between the temperature of surface and heat loss of metallurgy stove and the damage degree of its lining was established. These provide the way to detect the lining damage and evaluate heat preservation effect of metallurgy stove by infrared image on-line. It has also been proven by the examination that :both the damage degree and the quantitative analysis of metallurgy stove lining can be carried out by infrared image technology.