The invention provides a fault detection device and system. The fault detection device comprises a tooling plate; the tooling plate comprises a detection module; the detection module comprises a control unit and a signal generator which are connected with each other; the signal generator stores audio and video signals used for testing equipment under test; when the equipment under test is fixed on the tooling plate, the equipment under test can be connected with the signal generator; and after the control unit generates a test control signal, the signal generator is informed of sending the audio and video signals to the equipment under test for testing. Therefore, the equipment under test can be tested directly subsequently, and there is no need for every worker to connect and disassemble; and the worker can connect before the equipment under test goes into the production line flow, and the connecting process does not affect the operation of the production line, so that the stability of the operation of the production line is greatly improved.