Vehicle keyless entry method and system

The invention provides a vehicle keyless entry method and system. The keyless entry method comprises the following steps: by a PEPS controller, receiving the signal of a door handle switch sensor, awakening a CAN bus, and awakening a BCM through an LIN bus; by the PEPS controller, sending a vehicle door operation instruction and a first secret key to the BCM through the LIN bus; by the PEPS controller, awakening a key, and sending a second secret key to the key; and by the BCM, receiving the vehicle door operation instruction, the first secret key and a third secret key produced by encrypting the second secret key through the key, authenticating the first secret key and the third secret key, and when authentication succeeds, executing corresponding operation according to the vehicle door operation instruction, wherein the vehicle door operation instruction is associated with the state information of a vehicle after the former keyless entry operation. By adopting the method and the system, vehicle network awak