In a system in which a facsimile apparatus is connected to a LAN (Local Area Network) to which a plurality of computer terminals are connected, image data obtained by reading an original image by the scanner of the facsimile apparatus under the control of the operation unit of the facsimile apparatus is transmitted to a destination designated by the operation unit. In this operation, if a user ID is designated, transmitted image data and information (destination, transmission time/date, or the like) related to transmission is transferred to the LAN to notify the information to a user corresponding to the user ID. In this manner, data communication performed by a local operation of the facsimile apparatus and data communication performed by a remote designation from the computer terminal can be managed together.