Access control method, system and UE (user equipment)

The invention discloses an access control method comprising the following steps that: user equipment (UE) suitable for extended access control block (EAB) initiates a random access by use of a random access resource mapped corresponding to a self-mapped access service class (ASC), specifically, the UE suitable for extended EAB obtains the self-mapped ASC according to the system information of the network side, or obtains the self-mapped ASC according to a protocol based predetermined configuration. The invention correspondingly discloses an access control system and the UE. According to the invention, the random access process of the UE suitable for the EAB is controlled, and the high impact to the UE unsuitable for the EAB caused by the access of a large amount of UE suitable for the EAB, is avoided.