A communication device including an access authority data managing DB device for managing access authority data with which access authority for at least one of storage area defined logically or physically in a storage device. File data stored in the storage area is defined while at least one of a user making the access and a group to which the user concerned belongs is set as a unit. A non-open WWW device controls access to the storage device on the basis of the access authority data achieved from the access authority data managing DB device in accordance with an access from a terminal device.