Abstract: The methods of physical testing and chemical analysis are introduced for quality inspection on thermal barrier coats of the high temperature parts used in gas turbine power station. The results concerning the quality of the TBCs, such as the thickness, microstructure, compositions, hardiness as well as the state of the stress are provided and discussed. It shows the testing methods with the feasibility and reliability in practical application. The methods could be an effective ways for the coat processing improvement, the part quality comparison and the quality guarantee.