An automotive detecting system includes an automotive detecting host to detect when a car owner is near their car using a wireless technology. The automotive detecting host automatically controls a door locking mechanism, an alarm, and/or the car's ignition. The automotive detecting host includes an identity identification unit, a CODEC control unit, and a micro-control unit, and automatically controls the door locking mechanism, the alarm and/or the ignition as a user or a car owner approaches their car.