Power cable aging diagnosis monitoring method and system

The invention provides a power cable aging diagnosis monitoring method and system, and relates to the field of cable monitoring, and the method comprises the steps: monitoring the grounding current of an outer sheath of a cable, and judging whether the grounding current of the outer sheath is abnormal or not; when the grounding current of the outer sheath is judged to be abnormal, the fault position of the cable is positioned; starting a temperature monitoring device corresponding to the fault position of the cable; determining the type of the cable fault according to a thermal image fed back by the temperature monitoring equipment; if the type of the cable fault is a cable body fault, monitoring a test current of the cable when the specified voltage is switched on; and according to the test current, the aging degree of the cable is analyzed, and a corresponding maintenance strategy is generated. And after the existence of the fault is determined, the current between the cable core and the spiral steel belt i