Provided are a car lamp system and a motor vehicle. The car lamp system comprises a lighting lamp, a protection lamp and a control module, wherein the lighting lamp is configured to emit lighting light rays; the projection lamp is configured to project received information to be projected onto a projection medium; and the control module is configured to provide the information to be projected and turn on and turn off the lighting lamp and the projection lamp. According to the motor vehicle with the car lamp system, the projection lamp can project the information to be projected onto the projection medium, and the driving safety of the motor vehicle is improved.