Driving behavior warning system and driving behavior warning method

A driving behavior warning system, wherein the driving behavior warning system comprises a driving behavior detection unit, an electrically controllable viewing angle display unit and a control unit, wherein:

• the driving behavior detection unit is configured to detect behavior information of a driver;
• the electrically controllable viewing angle display unit is configured to provide a display beam and has a narrow viewing angle mode and a wide viewing angle mode, wherein a light emitting viewing angle range of the display beam in the narrow viewing angle mode is smaller than a light emitting viewing angle range of the display beam in the wide viewing angle mode;
• and
• the control unit is coupled to the driving behavior detection unit and the electrically controllable viewing angle display unit, wherein the control unit determines behavior posture of the driver based on the behavior information, the behavior posture comprises a normal behavior and an unconfirmed behavior, and the control unit controls a display mode of the electrically controllable viewing angle display unit according to a vehicle driving state and the behavior posture, wherein the vehicle driving state comprises a moving state and a stationary state, wherein the control unit controls at least a portion of the electrically controllable viewing angle display unit to continuously switch between the narrow viewing angle mode and the wide viewing angle mode when the behavior posture is the unconfirmed behavior and the vehicle driving state is the moving state.