A display device includes a supporting member, a mounting plate, a fastener, and a monitor. The supporting member includes a base wall defining two through holes therein, and a clamping portion extending from a bottom portion thereof. The clamping portion is capable of contacting with an upper surface of the worktable. The mounting plate has two through holes defined therein configured for contacting with a lower surface of the worktable. The fastener extends through the through holes of the supporting member and the through holes of the mounting plate to sandwich the worktable. The monitor is provided with a pillar extending downward from a bottom portion thereof. The pillar of the monitor is attached to the supporting member.