The embodiment of the present invention provides a transformer fault prompting method and an intelligent maintenance system. The method comprises the steps of determining whether a transformer fault occurs by gathering and analyzing the working state data of a transformer obtained by a detection equipment set, if the fault occurs, generating and displaying the prompt information to prompt the management personnel to arrange the maintenance personnel to maintain and process timely, thereby eliminating the fault, and guaranteeing the normal operation of the transformer. By maintaining the transformer timely, on one hand, major electric power accidents can be avoided, and the service life of the transformer is prolonged, on the other hand, the conveniences of the lives of residents can be guaranteed, and the resident experiences are improved.