BUCKLE DEVICE CAPABLE OF DISPLAYING LOCKED STATE

A buckle device (10) capable of displaying a locked state includes a main body unit (3), a latch unit (4), a fastening unit (5), an electromagnetic unit (7), and a control unit (8). The main body (32) unit includes a main body (32) and the latch unit (4) includes a detachable tongue element (41). The fastening unit (5) includes a bolt body (51) interfering with the tongue element (41). The electromagnetic unit (7) includes an electromagnetic module (71) and an electromagnetic rod (72). The electromagnetic module (71) controls the electromagnetic rod (72) to interfere with the bolt body (51). The control unit (8) includes a control module (82), a display module (84) and a magnetic bolt detection module (81) for detecting the position of the electromagnetic rod (72). The control unit (8) receives detection information of the magnetic bolt detection module (81) and controls the display module (84) to display a current state according to the position of the at least one electromagnetic rod (72).