Relay protecting and mis-operation preventing device and system

The invention relates to the field of relay protection, in particular to a relay protecting and mis-operation preventing device and system. The device comprises an acquiring module for acquiring first information of a relay protecting device, a secondary device module for determining a secondary device according to an operation task, a secondary operation order module for generating a secondary operation order or the relay protecting device in the secondary device of the secondary device module according to the first information in the acquiring module, and a sending module for sending the secondary operation order of the secondary operation order module to perform. With the adoption of the device and system, the first information of the relay protecting device can be acquired all the time; the secondary operation order can be automatically generated according to the operation task; the blank that the operation maintenance staff have no secondary operation order in the relay protection operation can be made up; the probability of mis-operation of the relay protection can be reduced.