The invention discloses a power transformation equipment account real-time inquiring method. Account information of equipment in a production management system is obtained in real time onsite directly via a mobile terminal scanning equipment RFID or a two-dimensional code by the method, and onsite fault analysis or maintenance analysis can be performed according to the account information. The method comprises the following steps that network connection is established by using a hand-held mobile terminal; an equipment ID is acquired and obtained by the hand-held mobile terminal; the request of the acquired equipment ID is sent via a Web service; an intranet database is accessed via the equipment ID so that the equipment account information is obtained; and the Web service of the production management system accesses the database and equipment account is obtained, the obtained equipment account information is returned back to the hand-held mobile terminal to be displayed, and onsite fault analysis or maintenance analysis is performed by users according to the displayed equipment information.