Network information-distribution method and device for transmitting information utilizing information-exchange relationships among users. Information is transmitted from user 1 to all or a portion of user 1's buddies, e.g., users 12 and 13. Next, having received the information, users 12 and 13 then forward the information to their respective buddies. The information is forwarded, for example, to users 211 and 212 registered on user 12's buddy list 21. Likewise, the information is also transmitted to the user group registered on user 13's buddy list 22. By repeating this, buddy lists expressing information-exchange relationships among users are utilized to distribute the information to great numbers of persons.