A night driving assistant system uses a tablet to wirelessly control an infrared camera in a motor vehicle. An infrared camera system is detachably fixed to the motor vehicle and captures the infrared thermal images of the road scene while the motor vehicle is moving and outputs the video signals of the captured infrared thermal images. A magnetic base is positioned under the chassis of the infrared camera system and attaches the infrared camera system to the motor vehicle. A tablet is detachably mounted inside the motor vehicle, connecting wirelessly with the infrared camera system and displaying video signals transmitted from the infrared camera system. By manipulating the tablet, functions can be realized such as operating the infrared camera system, recognizing a human/animal, triggering Global Positioning System (GPS) navigation, record/store/redisplay videos as well as processing multi-functions like split-screen display etc.