The vein recognition technology is a new kind of biometric identification technology, using the vein distribution image as an identification, non-imitative. The manager registers the vein images of people who have permission in the system in advance. Only when the vein authentication was passed can the people enter. As the vein is exclusive, it provides much stricter access control, ensuring the safety of goods and property. This system is widely used for applications like security department, government, bank, army etc