A lock device is provided. The lock device includes a housing with a front opening at an end; a rotating hook disposed in the housing and being rotatable relative to the housing, the rotating hook including a front-end portion and a rear-end portion, the front-end portion at least partially protruding from the front opening, and the rear-end portion extending toward a direction opposite to the front-end portion; a driving device disposed in the housing and selectively moveable to change widths by which the front-end portion is opened respectively; and a lock body disposed in the housing, when the lock body is locked, the lock body restricting a movement of the driving device.