The invention provides an access control system and a control method. The system comprises a server and a plurality of ticket box controllers connected with the server through a network, wherein vehicle information and authority rules are prerecorded by the server, an authority rule set consisting of the vehicle information and the authority rules is issued to the ticket box controllers, and the ticket box controllers automatically verify the authority rules according to the priority sequence of the authority rule set after acquiring identification information of a vehicle to be verified so asto determine whether to release the vehicle to be verified. According to the invention, the problem of the system and method in the prior art needs manual intervention, and causes low factory accesscontrol system work efficiency is solved.