The invention relates to an on-line repair maintenance system, which comprises repair management, maintenance management, maintenance project management, maintenance personnel management, department information management, user management, query management, a maintenance communication platform, notice management, user evaluation management, short message prompt service, statistical analysis management, system management and the like. According to the system, network supervision of repair maintenance service is realized, affair publication is realized, and the working efficiency is increased. Wrong repair information is not caused due to mishearing or poor handwriting, or the situation of no response to repair is not caused due to handwritten information loss. Management personnel can learn the working conditions of employees through maintenance progress and learn main contents of repair to further make correct statistical analysis and decision. Convenience is brought to maintenance personnel through short message notification of maintenance tasks, a user can perform network evaluation on maintenance service quality, and the system has a certain supervision effect on maintenance departments.