The invention discloses an intelligent transformer. The intelligent transformer comprises a transformer body, a data collecting device installed on the transformer body, an intelligent assembly and a communication module, wherein the intelligent assembly and the communication module are connected with the data collecting device and are connected. The intelligent assembly comprises a transformer monitoring main control unit, a comprehensive measuring unit, an oil chromatogram and micro-water monitoring unit, a partial discharge monitoring unit, an iron core grounding current monitoring unit, an acoustic fingerprint monitoring unit, a transformer sleeve insulation monitoring unit and an on-load voltage regulation switch monitoring unit. The data collecting device is installed on the transformer body in a matched mode and transmits collected related data to the intelligent assembly, the intelligent assembly compares the received data with preset data, remotely transmits a comparison result to a dispatching center through the communication module, gives an alarm at the same time and indicates fault causes and fault points, and therefore the dispatching center can maintain the transformer in time to ensure stable operation of a power grid.