The invention discloses a XML-based electric transmission and transformation equipment state data exchange adapter and use method thereof. The XML-based electric transmission and transformation equipment state data exchange adapter is used for building the corresponding data exchange relationship between the data of source database and that of target database through XML Schema processing, and comprises a XML-to-relational database mapping method module, a data model XML Schema processing module, a database processing module and a XML-to-target database mapping process module. The XML-based electric transmission and transformation equipment state data exchange adapter has the advantages that: through an adapter, the required data can be obtained directly from the database, as long as it is ensured that the interfaces provided by the adapter for business system call remain consistent, the adapter can adapt to different business systems; through the connection of dynamic configuration, definition implementation and application system, the users who need data do not need to face a specific database and the details of a data source, just need to tell the required data model to a data exchange center, so the development efficiency is greatly improved, the burden on the staff is reduced, and the system can easily be extended.