Abstract: A group member management support system and method are disclosed for effectively supporting group member management such as analysis of psychological states of students in a school and figuring out friend relations of students accordingly. The group member management support system includes a database storing self-expression index representing psychology or feeling of each member of a group, an interface server receiving the self-expression index through a network from the member to store the self-expression index in the database, and a member's terminal receiving the self-expression index to transmit the self-expression index to the interface server through the network; and a manager's terminal requesting and receiving the self-expression index from the interface server through the network to display or output the self-expression index.