The operation principle of infrared thermal imaging is presented. The infrared thermal imaging is firstly proposed to be used in the production of electric heating glass. Its feasibility and effectiveness are verified. Further, the application of infrared thermal imagers in the testing and examination of electric heating glass is studied and three application examples are given. The research result shows that infrared thermal imagers not only can be used to qualitatively analyze the heating uniformity of electric heating glass and quantitatively measure the heating temperature difference of glass surface, but also can be used to nondestructively test glass products, find and analyze their defects and conduct the improvement of glass manufacturing processes.