The invention discloses a linking method and system for a vehicle-mounted intelligent traffic light, aimingto increase theintelligence of system and the accuracy of signal acquisition. The linking system comprises an image recognition system and an image acquisition sensor connected with the image recognition system, wherein the image recognition system is also in communication connection with a navigation system, an engine control unit and a brake control system; the navigation system is used for judging if the traffic light in the preset distance along the advancing direction of the vehicle according to the position information of the vehicle and informing the image recognition system if the traffic light is detected in the preset distance along the advancing direction; the image recognition system is used for informing the image acquisition sensor of acquiring the corresponding image and extracting the features of the acquired image, so as to recognize the state of the traffic light on the current lane of the vehicle and generate a danger warning signal and send to the engine control unit and the brake control system when the traffic light on the lane is detected.