Fingerprint door lock is a security product that integrates computer technology, biometric recognition technology, electronic technology, mechanical technology and modern hardware technology. The feature of fingerprint has become the most identification evidence. The fingerprint identification has the features of convenience, quick matching speed, precision. With the development of smart home technology, more and more people choose fingerprint door lock. The main material that used in the fingerprint lock is zinc alloy. The core components of fingerprint door lock is face plate, clutch, fingerprint collector, PIN code technology, CPU, emergency keys etc. As a fingerprint door lock, the most important is the algorithm chip. Whatever kind of the lock is, it is essentially the mechanical product. Mechanical technology includes following five aspects: the design of outside and inside housing, the lock body, motor, fingerprint module, the keypad, the chip, the fingerprint sensor. The essence of the the fingerprint door lock is fashion, convenience, and security. There are many ways of fingerprint lock unlocking, including fingerprint unlock, PIN code unlock, card unlock, app unlock, emergency unlock. The fingerprint management function is adding fingerprint users, deleting fingerprint users, clear out fingerprints, and setting different mode. The common users can just using the fingerprint to unlock.