A navigation terminal for calculating a route or a route information server sets multiple proposed locations for an appointment according to various conditions or options provided by a user for the determination of an appropriate location for the appointment between multiple parties. The navigation terminal or the route information server calculates an optimal route to each proposed location from each party's origin and extracts an optimum level of each calculated route to finally determine the most appropriate location for the appointment. The navigation terminal or the route information server automatically sets a location most appropriate and convenient to all parties of appointment, thereby enhancing convenience and effective time management.