The present invention relates to a no power outage maintenance method for a switchgear cabinet. The method comprises the following steps: 1) sensing the state of the switchgear cabinet; 2) performingdata analysis and diagnosis; 3) incorporating the node type switchgear cabinet; and 4) repairing the fault switchgear cabinet. According to the method provided by the present invention, the sensor isused to monitor the mechanical characteristics, temperature, partial discharge and other parameters of the switch device, and through edge calculation and switch state analysis, the alarm result is analyzed and notified to the management personnel to grasp the switch state in time and arrange the inspection plan reasonably; the quick interconnection technology is used to implement rapid maintenance of the switchgear, so that the power outage time can be shortened, the reliability of the power supply can be improved, beforehand state maintenance of the switchgear cabinet can be truly conducted,and user power consumption experience can be enhanced; and the method can be applied to scenes such as a distribution network opening and closing station, a ring network cabinet, a circuit breaker ona column, and the like.