The present utility model relates to an electric power transformation overhaul mobile risk control system. The system is characterized in that the system comprises a mobile terminal, a main station unit communicated with the mobile terminal in real time, the mobile terminal is provided with a central processor, a 3G communication module connected with the central processor in a signal way, a camera connected with the 3G communication module in a signal way, and a risk control module of the main station unit, which is connected with the central processor in a signal way. Remote visual service can be provided through the 3G communication module and the camera, communication is realized with the risk control module of the main station unit, an unkeep knowledge risk database can be provided for on-site operation personnel, processing schemes and safety measures for overhauling great and typical defects can be provided, the unkeep personnel can be assisted to timely eliminate equipment faults, manpower, material resources and financial resources can be reduced, and pragmaticality and safety can be enhanced. When the operation personnel encounters unsolved technical problems, experts at the main station unit can provide remote assistance through the 3G communication function of the mobile terminal.