Device for switching between a vehicle navigation system and a night vision system as well as a switching method thereof

The present invention discloses a device for switching between a vehicle navigation system and the night vision system as well as switching method thereof. The said device includes a navigation system switching module connects to the navigation system and a night vision system module connects to the night vision system, while both systems are connecting through video signal cable, and the switching modules are connecting through communication cable. Both switching modules are able to control any system switching into either mode, and transmit any info into either system then displaying the info. Therefore, the navigation system is also able to display night vision info and vice versa, which provides convenience to the users and improves the driving safety.