Along with the fast development of high power lasers, the corresponding measuring techniques should be improved to withstand the long time irradiation of high power density laser beams. An aluminum panel is coated with ZrO2 thermal barrier coatings (TBCs) using plasma spraying method as the high power laser proof. Diffuse reflection characteristics of the coating are investigated at different wavelengths. Finite element analysis is conducted to analyze the thermal response of the ZrO2 TBCs under the high power laser irradiation. Moreover, related experiments are carried out with high power fiber lasers, which demonstrat that the TBCs is an effective method for heat insulation.