A foldable mechanism includes a first movable plate, a second movable plate and a linkage structure. The first movable plate is below and supports an object to be rolled. The second movable plate is spaced apart from the first movable plate along a first direction, is connected to a first end of the object to be rolled and is below and supports the object to be rolled. The linkage structure is movably connected between the first movable plate and the second movable plate. The first movable plate is configured to move along a second direction to drive the linkage structure to fold or unfold, and the linkage structure is configured to drive the second movable plate to move close to or away from the first movable plate along the first direction, so as to switch the object to be rolled between a rolled state and an unrolled state.