The utility model discloses a full -automatic closed loop detection device of fault indicator, it is including switch board and operation panel, its characterized in that, the switch board including:test system software unit, test system hardware unit, test system hardware unit carries out fault detection to the equipment of awaiting measuring, test system hardware unit and control console connection are with test waveform output to the operation panel of postdetection, the operation panel is including image identification unit for gather the test wave form among the test procedure, test waveform transmission that image identification unit will gather carries out the analysis for the test system software unit, reachs the testing result according to the analysis of test system software unit. The beneficial effects of the utility model are that: can realize high efficiency, reliable full automated inspection, the testing object wide range can detect a plurality of fault indicator, the detection project is comprehensive, and experimental wave form is able to programme, operation safety protection nature is high.