A user inputs a position of a registration point by using an input device
of an on-vehicle navigation device. A navigation ECU transmits the
position of the registration point as a maintenance request to an
information center. A center control section reads from a facility
information memory section facility information of a facility existing at
the position of the registration point and returns the facility
information as maintenance data to the device. In the vehicle, new
registration point data including the position of the registration point
and the facility information is stored in a customizing information memory
section. The user need only perform a simple operation, e.g., inputting of
the position in order to obtain rich and detailed information.
Furthermore, the registration point data in the memory section is
appropriately updated with the updated information of the information
center by using data communication with the information center.