Disclosed is an application inspection device. The disclosed application inspection device comprises: i) a fixing unit fixed on a nozzle of an application gun mountable on a robot arm; ii) a rotation unit installed on the fixing unit to be infinitely rotatable, which a camera is mounted toward the end of the nozzle; iii) an electric signal system unit installed on the fixing unit and the rotation unit, supplying power on the camera, and sending image signals of the camera; iv) a plurality of electromagnets radially installed on the fixing unit and receiving power so as to generate the electromagnetic field; and N and S pole magnets respectively installed on the rotation unit in a radial direction corresponding to the electro magnets.
