An information distribution system 3 including a portable telephone set (70), having a display unit for displaying image data, and a communication function, and owned by a user, an image data processing device (11), having an image data processing function and a communication function, a server (12) for storing image data transmitted from the image data processing device (11), and a portable telephone base station 13 connected to the portable telephone set (15) over a portable telephone communication network (14). A list of the addresses formulated in the past is displayed on a display unit of the portable telephone set (70). The text data included in the data referenced by the address selected from the list of addresses displayed is modified and a new address is appended to the modified data.