The present invention provides a transformer substation online intelligent inspection system and method. According to the transformer substation online intelligent inspection system and method, the linkage signals of the main and auxiliary device monitoring systems are obtained, and multi-dimensional information can be fused; meanwhile, different execution systems are used for concurrently executing the corresponding sub-tasks, so that the inspection efficiency is ensured; based on the data collected by each execution system, multi-dimensional detection data is fused, and full-automatic intelligent identification and analysis are carried out to form linkage recheck. According to the invention, the automatic full-coverage on-line inspection of the transformer substation, the automatic recheck and disposal of abnormal faults and the remote operation and maintenance management of operation and maintenance personnel can be realized, the problems of inspection blind areas, small and singlevideo coverage range, untimely fault emergency disposal and the like of robot inspection are solved, the comprehensiveness, accuracy and intelligence of the transformer substation device inspection are improved, and the system linkage capability in the transformer substation is improved.