The invention discloses an automobile double-driving double-control method and system based on steering intervention. The method comprises the steps that an instruction of an upper computer is received through an ECU controller, whether steering intervention occurs or not is judged, and the phenomenon that a manual driving mode and an automatic driving mode are conducted simultaneously or switched is achieved; in the state that the manual driving mode and the automatic driving mode are conducted simultaneously, an operation instruction of a driver rotating a steering wheel to conduct steering and auxiliary force output by automatic driving are received, and the driver is assisted in conducting steering control; in the automatic driving mode state, the steering angle is sent to a steering controller by the upper computer through the ECU controller, an output shaft is automatically controlled for steering, a feedback value of a steering sensor is read, and an actual corner is sent to the ECU controller. Accordingly, the phenomenon that manually controlled manual driving and ECU controlled automatic driving are switched is achieved, and the safety of personnel and vehicles in the actual using process is improved.