Abstract: Disclosed is a method for sharing reliable information or knowledge with regard to a question using an on-line human network. The on-line human network-based knowledge sharing method is to share knowledge based on an acquaintance information database. The database stores the IDs of a plurality of users, and the correspondence relationships of the user IDs, which represent acquaintanceships between the users on the on-line human network. The method includes allowing a first user to write a question message in a form that can be forwarded through the network, generating a question ID for identifying the question message and storing the generated question ID, causing the ID of the first user to correspond to the question ID, allowing a second user who is acquainted with the first user to receive the message, and causing the ID of the second user to correspond to the question ID.

Abstract: Disclosed are an apparatus and method for communication using an icon. A first communication terminal of a first user stores a second user icon profile including an icon(s) representing at least one communication terminal used by a second user and a second communication terminal of the second user stores a first user icon profile including an icon(s) representing at least one communication terminal used by the first user. When the first user a first icon from the at least one icon forming the second user icon profile, the first user can communication with the second communication terminal of the second user represented by the first icon using the first communication terminal.

Abstract: Disclosed is a method for sharing reliable information or knowledge with regard to a question using an on-line human network. The on-line human network-based knowledge sharing method is to share knowledge based on an acquaintance information database. The database stores the IDs of a plurality of users, and the correspondence relationships of the user IDs, which represent acquaintanceships between the users on the on-line human network. The method includes allowing a first user to write a question message in a form that can be forwarded through the network, generating a question ID for identifying the question message and storing the generated question ID, causing the ID of the first user to correspond to the question ID, allowing a second user who is acquainted with the first user to receive the message, and causing the ID of the second user to correspond to the question ID.