Measuring the temperature of the molten glass in glass furnace is crucial for ensuring high-quality production and energy saving. By accurately measuring the temperature of the glass melt at key locations in the furnace, such as the bottom, throat, working end and forehearth, the process can be optimized and productivity and product quality can be significantly improved. Moreover, different types of thermocouples and their installation techniques in various areas were discussed, as well as how to calculate thermal efficiency, which was important for optimizing kiln operations and improving energy efficiency.