The invention relates to a transformer station state monitoring method based on relay protection and fault information management main station data. The transformer station state monitoring method based on relay protection and fault information management main station data includes the following steps: establishing an assessment model for the state of a transformer station to be specifically maintained, defining the related KPI (Key Performance Indicator) for state monitoring of the transformer station to be specifically maintained, configuring a transformer station to be assessed, performing real time analysis and calculation on the basis of the relay protection and fault information management main station data of the configured transformer station, and finally outputting the statistical analysis result to a commercial library list. The transformer station state monitoring method based on relay protection and fault information management main station data provides an automation auxiliary means for remote special maintenance of the transformer station for a scheduling operation person by means of the man-machine main interface software analysis and management of transformer station state information, and can greatly improve the operation efficiency of the transformer station.