Abstract: In view of continuity problems in coke production,a multi-subsystem entropy-based operating-state identification is proposed for coke oven combustion processes. First,the operating states are divided according to heat balance. Then,the coke oven is decomposed into many subsystems based on structural characteristics and heat-transferring mechanism. On the basis of the trend analysis for raw gas temperature,the coking stage of coking chambers is judged,and the heat consumption level of each subsystem is then analyzed. An information-entropy-based method for evaluating the subsystems' influence on different operating-states is applied to identifying the operating state for the coke oven's combustion process. Finally,the effectiveness of the proposed method is verified by simulation and application.