Abstract: In order to gain deeper insight into the driving mechanisms that produce the observed thermal contrasts of different types of damage. In this paper,the numerical simulations on thermal effects of sand erosion wear,cracks and internal adhesive damage are carried out based on the field infrared thermal imaging and scene reconstruction using heat conduction theory. From the results of thermal imaging comparison and multi-point temperature measurement,all results are consistent very well. This shows that the numerical model is correct and the method is feasible.