The invention discloses a man-machine-object combined anti-electricity-stealing inspection monitoring system and a working method thereof, and relates to the field of electric power inspection monitoring. The electricity larceny user means has intelligence, concealment, large scale and occupational property, and the difficulty of finding electricity larceny on site by the existing electric power working personnel is high. The system comprises a data acquisition processing module; an anti-electricity-stealing algorithm model library management module; an anti-electricity-stealing early warningmodel customization module; a suspected electricity stealing judgment module; a suspected electricity stealing user judgment result storage module; a work order generation module; a work order processing module; a data acquisition module; a work order filing storage module; and a data feedback module. According to the invention, the electricity utilization and collection system, the on-site detector and the collection, operation and maintenance handheld machine are fused, the timeliness of electricity stealing prevention work is improved, the problems of high difficulty, time and labor consumption, untimely and no strong professional support of on-site electricity stealing discovery by existing electric power workers are solved, and the economic loss of power enterprises caused by insufficient manpower resources is avoided.