Abstract: With an aim to enhance the rate of equipment in good condition, and reduce the downtime and maintenance cost, an equipment on-line monitoring system is designed according to the equipment layout and monitoring requirements of the plant, based on industrial Ethernet and iFix monitoring and control software. Practice shows that after installation and commissioning of the monitoring system, a multiple of functions can be performed by the system, including main equipment operating status real-time monitoring and recording, failure alarming and historical data query. This provides a solid basis for timely detection of hidden troubles of equipment, providing equipment management information and ensuring the smooth operation of equipment.