[Object] To provide a means that enables information exchange with more fun by reducing dull and uninteresting impression in the information exchanged via a network.[Solution] Each member of an instant messaging system 1 connects an aroma emitting adapter 13 to a terminal device 12 and loads an aroma cartridge 14 containing aroma liquid in the aroma emitting adapter 13, whereby the member can log on a messaging server device 11. The terminal device 12 of the member who logs onto displays names of the members with whom the message exchange or conversation can be made among the other members who are currently logged on. Upon the reception of the message or voice calling from another member, the terminal device 12 instructs the aroma emitting adapter 13 to emit the aroma and the aroma emitting adapter 13 thus emits aroma by releasing the aroma liquid contained in the aroma cartridge 14. As a result, the message or conversation can be accompanied by the aroma.
