This invention provides a dynamic hydrogen-storage apparatus and the method thereof, which includes the following steps: (a) filling a container with a porous hydrogen-storage material which is loaded or doped with a catalyst; (b) setting an operational pressure and a pressure drop for the operation of storing hydrogen; (c) providing the hydrogen-storage material with a hydrogen so as to increase the pressure of the hydrogen to the operational pressure; (d) decreasing the pressure of the hydrogen by the pressure drop; and (e) repeating steps (c) and (d) for a predetermined amount of times.