A sliding mechanism comprises a retaining board, a sliding board, a connecting element, a driving assembly. The connecting element is connected between the retaining board and the sliding board, the connecting element is configured for move a portion of the sliding board away from the retaining board. The driving assembly is mounted on the retaining board and the sliding board, the driving assembly being configured to exert attractive force between the retaining board and the sliding board so as to selectively orient the sliding board relative to the retaining board in a close position or an open position.