Abstract:To improve the degree of ship-automation, realizes the unmanned engine room, the expert control technology applied to the engine room monitoring and alarming system.The structure and principle of the expert control system is expounded in detail. The modeling process is introduced from the controlled object, the expert controller, rule base and reasoning machine.Combined with the function structure, knowledge representation and sensor data preprocessing,the establishment of intelligent engine room monitoring alarm system is completed.Finally, expert control engine room monitoring alarm system is verified in DMS-2015 that Dalian maritime university develops marine engine room simulator. The application of the system, makes the alarming more accurate and troubleshooting more convenient, greatly reduces the engineer's work on fatigue strength, and provides a new way of thinking to engine room monitoring alarm.