Access control method, device and system

The embodiment of the invention discloses an access control method, device and system. The method comprises: obtaining the credibility information of an access subject and the important degree information of an access object; according to the obtained credibility information of an access subject and the important degree information of an access object, and a preset access control strategy, determining the control information of access connection between the access subject and the access object; and according to the determined control information, controlling the access connection between the access subject and the access object. Real time credibility is constructed based on dynamic behavior monitoring and behavior analysis, so that the access control method, device and system can realize dynamical and adaptive access control; meanwhile, the access control method, device and system perform important degree division on operation systems and operation assets, and have a dual safety guarantee base. 本发明实施例公开了一种访问管