Abstract: A car reverse alerting and multi-functional display is disclosed. A display and trumpet are mounted on the multi-functional rear view mirror of a car. A charge coupling device, a microphone, and a car reverse sensor for monitoring the images, sounds and distance at a backside of the car are installed. The monitored analog electronic signals are decoded through a decoder so that the electronic signal is converted into a digital signal from an analog signal. Then, these signals are transferred to the multi-functional rear view mirror by cable or wireless devices. Then the signals are processed by a central processing unit. Then an image signal is outputted to a display for displaying; and meanwhile, the display outputs the sound signal from the microphone. The driver can reverse a car safely from the image and speech alert.