Abstract: Analysis is conducted on the limitations of traditional video monitoring technology in application,a video surveillance intelligent inspection system is proposed based on high-definition network cameras, and the composition, network structure, point selection, and other contents of the system are discussed. By the application of this system in the inspection of a certain ultra-high voltage transformer, the inspection results of the system in visible light inspection, infrared temperature measurement of the casings and on-site meter readings are compared with manual inspection, which verifies the accuracy and effectiveness of the system, ensures the personal safety of operation and maintenance personnel in substations during the inspection process, and improves the quality of equipment inspection.