In modern world,new techniques such as biometric recognition tech., image processing tech, communication tech and so on, have been integrated into car security systems. At the same time, the amount of accident of cars still remains high, specially, lost. When one car is really lost, no more feedback could be valid to help people to find it back.we introduced for embedded smart car security system is proposed, which consists of a Fingerprint recognition subsystem, a GPS (Global Positioning System) module, a GSM (Global System for Mobile Communications) module and a control platform. The Fingerprint module gives security and prevents the starting of the car form unauthorized user, and make an alarm loudly or soundlessly. The other modules transmit necessary information to users and help to keep eyes on cars all the time, even when the car is lost. The Fingerprint system to be applied in car security system because this kind of technique is effective and fast, and one alarm signal could be given to make an alarm or “call” the police and the host soundlessly with the help of other modules in the system prototype.