The invention discloses a lock system and method for an automobile. The lock system comprises a controller, a glass breaking sensor, an automobile door position sensor, an automobile door locking mechanism and a blocking device, wherein the controller is configured to be capable of receiving first signals which indicate breaking of automobile glass from the automobile glass breaking sensor, the controller is also configured to be capable of receiving second signals which indicate opening and closing of an automobile door from the automobile door position sensor, and the controller is further configured to be capable of controlling the automobile door locking mechanism to lock the automobile door according to the first signals and the second signals and controlling the blocking device to block the face covered with the automobile glass.