The invention discloses an intelligent safety monitoring system for a substation. The system comprises a display device, a management center server as well as a transformer monitoring device, a breaker monitoring device, a lightning arrester monitoring device, a door control security device, a monitoring system, a warning device, a field controller and a wireless communication device which are located on the monitoring field of the substation, wherein the transformer monitoring device, the breaker monitoring device, the lightning arrester monitoring device, the door control security device, the monitoring system, the warning device and the wireless communication device are connected with the field controller; the display device is connected with the management center server. According to the system, working states of a transformer, a breaker and a lightning arrester of the transformer are monitored online and pre-warned, so that fault information can be discovered early and processed timely, an operator masters equipment operating condition in real time, and the door control security device is arranged to perform identity recognition on people entering the substation and record in-out time.