A car includes a car body, a camera unit, a driving unit, a display unit, a processing unit and a power source unit. The car body includes a rear portion. The camera unit is moveably coupled to the rear portion and is configured to capture images. The driving unit is to drive the camera unit to move along the rear portion. The display unit is configured to display the captured images. The processing unit is configured to receive the captured images, send the captured images to the display unit to display and control the driving unit to drive the camera unit. The power source unit is configured to supply electrical power to the camera unit, the driving unit, the processing unit and the display unit.