The invention provides a panel capable of being rapidly folded and unfolded. The panel comprises a plurality of unit plates which are connected with each other and can fold relative to each other, so the panel can be folded and unfolded between a folded state and an unfolded state in a Miura pliage method. The panel is characterized in that actuating devices are arranged among the unit plates. The actuating devices are elastic devices or magnetic devices. The actuating devices can apply elastic forces or magnetic forces on adjacent unit plates, so that the unit plates are unfolded or folded relative to each other. Thus, the panel can be automatically unfolded to the unfolded state or folded to the folded state in the Miura pliage method.