The invention discloses a method and a device for access terminal permission control and a host terminal. The method comprises the following steps: acquiring task information of an access terminal; analyzing according to the task information to obtain role information corresponding to permissions required by task execution; obtaining a constraint relationship between the role information and the task information, and searching a role set according to the constraint relationship, the role information and the task information; judging whether the role set is unique or not; when the role set is unique, allocating the authority corresponding to the role set to the access terminal, carrying out reasonable authority allocation on legal access terminal equipment. Therefore the problems of data resource leakage and resource waste caused by too many allocated authorities can be avoided.