The invention discloses a remote setting method of relay protection setting value, which comprises the following steps: a master station obtains the master protection setting value of a relay protection device; The master station checks the setting value of the master protection; When the master station checks the master protection setting successfully, the backup protection setting value of the relay protection device is calculated; The master station sends the main protection setting value and the backup protection setting value to the relay protection device; The relay protection device receives the master protection setting value and the backup protection setting value sent by the master station; The relay protection device checks the main protection setting value and the backup protection setting value respectively; When the relay protection device checks the main protection setting and the backup protection setting successfully, the main protection setting and the backup protection setting are written into the relay protection device; The relay protection device feeds back the modification successful signal to the master station; Upon receiving the modification success signal, the master station updates the protection setting database. The setting method can avoid wrong setting input and improve the accuracy and reliability of relay protection setting method. The invention also discloses a relay protection setting remote setting device.