A mounting device is configured to mount a carried object to a connecting board. The connecting board is arranged with a mounting hole for mounting a positioning member of the carried object. The mounting device includes a blocking portion, an operating portion, and a base portion. The blocking portion is adjacent to the mounting hole of the connecting board. The operating portion is operatively connected to the blocking portion. The base portion has a first section connected to the connecting board, and a second section connected to the blocking portion. Wherein, when the positioning member of the carried object enters the mounting hole of the connecting board, the blocking portion is configured to block the positioning member; and when the operating portion is operated to move the blocking portion away from the mounting hole of the connecting board, the positioning member is able to disengage from the mounting hole.