An on-vehicle control system for controlling various apparatuses mounted on a vehicle contains a front control unit for a front seat passenger and a rear control unit for a rear seat passenger. The front control unit is provided with the functions necessary for driving, such as the navigation control function and audio equipment control function, and the rear control unit is provided with the functions having elements of entertainment, such as the Internet communication function, functions to control games and videos, and audio equipment control function. Thus, the on-vehicle control system enables a user to communicate with the Internet, to concentrate the management of on-vehicle apparatuses, further to control the linking of the functions of the apparatuses, and not sacrifice safe driving or the elements of entertainment.