A system which uses movement of a human body to control a function of a terminal comprises: a detecting device for detecting variation of the movement of the human body depending on an intention of a user so as to transmit a detection signal; and a terminal for storing a reference signal according to at least one class of movement and a control signal corresponding to the reference signal, for searching for a reference signal the same as the detection signal received from the detecting device, and for processing a function based on the control signal corresponding to the reference signal when the reference signal the same as the detection signal is identified. Thereby, a user not only controls the terminal or a driving device, but also performs authentication processing using simple movement of his/her body without any hand operation. A corresponding method for controlling a function using movement of the human body is disclosed.