The invention relates to an auto-induction door access system and an implementation method of the system, which is used in the fields of bank, hotel, machine room, armory, confidential room, office room, intelligent community, factory, high-way toll station and so on. The auto-induction door access system mainly comprises a mobile device, application program, a door access, a computer and a management background, which form the basic conditions for performing the door access function. The mobile device is used as the carrier having the access right of the door access system; the door access system management background provides an account and a password to a user; and the user can communicate with the door access system based on the short-distance wireless communication function of the mobile device, then logs in the door access system by using the account and the password, finally uses the function of the door access system after identity authentication by the two parts. The auto-induction door access system provided by the invention does not need to carry, and has the advantages of zero use cost, high safety, high convenience in operation, and so on.