A dynamic storage device includes a storage area, a power carrying and moving device, a carrier group, a carrier detection device, a power transmission device, a gate, a gate detection device, a temporary storage area and a temporary storage area detection device. The storage device further includes a central control system for commanding, controlling, instructing and managing the aforementioned components and managing the information returned from each component. A Radio Frequency IDentification (RFID) technology is used to implement the dynamic storage device and the dynamic access management method. Basically, the RFID tag is labelled to the carrier instead of the object, and the targets managed by the storage device and dynamic access management method are the carrier and carrier group. Each carrier forming the carrier group records the detailed object information contained in the carrier by the RFID tag, so as to achieve the effects of managing the object, improving the space utilization of the storage device, and recording the storage locations of all objects correctly and completely by the central control system.