A wireless communications terminal stores owner information and function states. A terminal control device transmits, to the wireless communications terminal, control data including control target information for specifying a terminal to be controlled and function state change information indicating a change made in the function states of the terminal. The wireless communications terminal determines, based on the received control target information and the stored owner information, whether or not a function state(s) is to be changed, and changes the stored function states in accordance with the determination result. The wireless communications terminal transmits, to the terminal control device, a process end notification including the terminal's own identification information and indicating whether or not the function state(s) has been changed.