in a method for intermediating images , user group information concerning at least one user group to which the user belongs is extracted from a user group table recording a relationship between the user and the user group based on the authentication information of a user . the user group information extracted is sent to the user and obtaining information of a selected user group selected by the user and an image corresponding to the selected user group selected by the user is extracted . then , the image corresponding to the selected user group is sent to the user .