The invention discloses a method and a system for automatically controlling an automobile to not to run red lights. The system comprises a radio-frequency signal transmitter, a radio-frequency signal receiver, a road position sensing device, a transmitting device, a signal processor, an automobile speed sensor, a distance detector, a brake controller and a power controller, wherein the radio-frequency signal transmitter is connected with the radio-frequency signal receiver via a wireless transmission channel, and the radio-frequency signal receiver, the road position sensing device, the automobile speed sensor, the distance detector, the brake controller and the power controller are respectively connected with the signal processor. States of traffic lights are transmitted via radio-frequency signals which are then processed by the signal processor, so that the power controller and the brake controller can be controlled to control an automobile according to the position relationship of the automobile, transmission of the radio-frequency signals is free of influence from change of external environment, flexibility for automatically controlling the automobile to not to run the red lights is improved, and controllability for preventing the automobile to not to run the red lights is improved at the same time.