A monitoring device for managing at least one applicator fixture mounted on an applicator which has a magnetic body and connects a terminal to wiring via up and down movement. The monitoring device having a magnetic sensor which is mounted on the applicator and senses the movement of the magnetic body. At least one slave module receives identification information of the applicator fixture and mobility information of the magnetic body sensed by the magnetic sensor. A master module receives the identification information of the applicator fixture and the mobility information of the magnetic body in real time from the at least one slave module, while an interface module generates a monitoring interface indicating the degree of use of at least one applicator fixture by using the identification information of the applicator fixture and the mobility information of the magnetic body.