The identity screening and personal credit of car renters can&;t get authoritative authentication, and the customer consumption information among car rental companies is not shared, which leads to the car rental companies can&;t clearly grasp the credit situation of users. The situation that the rented vehicles are cheated and stolen often brings a lot of losses to car rental companies. When traffic accidents and violations occur due to the lessee, it is impossible to restrain the illegal drivers from accepting punishment, and it is also common for car rental companies to punish them on their behalf.