The present invention provides an exchange system which makes it possible to control connection and disconnection between terminals by an operation method which can be intuitively recognized. The exchange system includes display means for displaying icons of various terminals on screens of the terminals, detection means for detecting association between the icons performed on the screens of the terminals, and control means for controlling connection and disconnection between the terminals and/or connection and disconnection between an exchange apparatus and the terminals depending on the contents of the association.