<p>This study adopted the tube-in-tube method combined with infrared thermometer to conduct online continuous temperature measurement on a 7.63 m coke oven. The system obtained key thermal parameters such as the center temperature of the coke cake, the lateral temperature, the temperature of the top space of the oven, and the temperature of the raw gas. Based on material balance and heat balance calculations, the thermal efficiency and heat consumption of the coke oven were evaluated, and the heat distribution and operation status of the coke oven were analyzed in depth. The research results indicated that there is still some room for optimization in terms of uniformity of heating, combustion efficiency, and heat loss of the coke oven. In response to potential problems, corresponding optimization and improvement suggestions were proposed to improve the thermal efficiency of the coke oven, reduce energy consumption, and ultimately achieve the goals of energy conservation and emission reduction and ultimate energy efficiency. This research provided data support and technical references for the refined management and energy efficiency improvement of large coke ovens.</p>