Biometrics is a technique to deal with people's biological characteristics, for example, fingerprint, palm vein, iris and facial recognition. It is a kind of measurement, analysis and recognition technique for human identification.Biometrics can enhance the safety of the system and guarantee the accuracy of the data. It uses state-of-the-art science, which is one of the fastest growing technologies in the world. This technology is widely used in many countries in many areas like border control, banking, institutions, commerce and so on.So, the biometric voting system is the uses of biometrics in a voting system.