To actualize the transmission of multimedia images from anywhere the minimization of the amount of data in processing and editing, reception at time convenient for a recipient, etc.

A server 50 and portable telephone sets 20 and 60 are connected by W-CDMA via a network 100. The portable telephone set 20 and a portable information terminal 10, and the portable telephone set 60 and a portable information terminal 70 are connected together by Bluetooth respectively. The portable information terminals 10 and 70 have a function of generating chat mail which includes multimedia images. The portable telephone sets 20 and 60 have a function of sending and receiving the chat mail generated by the portable information terminals 10 and 70 between the server 50 and portable information terminals 10 and 70.