Abstract: This paper describes architecture and characteristics of experimental physics and industrial control system(EPICS), and the structure and characteristics of the monitoring network of the poloidal field power supply control system based on EPICS. It focuses on the development and application of EPICS device support in monitoring network of poloidal field power supply control system. The EPICS designed in this paper monitors the status, sends the command of opening or closing the switches, sets the configuration parameters, and controls the time-sequence for the local controllers in the poloidal field power supply control system. When a breakdown occurs, it can give an alarm and the software can locate the system fault. This system can monitor nearly 2 thousands digital and analog signals and support multi-user operating. The good features of EPICS are very helpful for the integration of the poloidal field power supply control system.