Automatic checking system and method of relaying protection device

The invention discloses automatic checking system and method of a relaying protection device, comprising a tester. The test is connected with the relaying protection device to form an electric loop and is connected with a client terminal working station through network. The invention is characterized in that the client terminal working station is internally provided with a client terminal module and an interface linking library, wherein the client terminal module provides all user interfaces and scripts used for automatic test; the relaying protection system tester receives the test scripts, carries out the real test on the relaying protection device, and returns data according to the requirement of the scripts; and the interface linking library is a definition standard between the clientterminal module and the relaying protection device tester and is also a data transmission channel in execution. By defining a standardized interface standard and realizing interface function, the invention enables user terminal software to control the relaying protection device tester through network and carry out test operation according to methods and procedures described in the scripts, thereby lowering the requirement on personnel, simplifying the working process and uniforming data forms.