According to the present invention, the picture data pieces read from the same film are recorded on a recording medium along with information of the same film ID. This enables the film digitize device to easily extract picture data pieces read from the same film by reading information of film ID given to the picture data pieces when the device capture the picture data pieces recorded on a recording medium, for example, into a personal computer for management. If extracted picture files come with frame numbers in the reverse order of the pictures taken, the film digitize device can rearrange the frame numbers in the order the pictures taken by reversing the frame numbers in block.