Procilege is a purpose-specific computation unit for privilege analysis. The Procilege transparently provides applications both access control and privilege regulation. Procilege implements a calculus named Privilege Calculus, where the problems of separation of duty are reduced to the composition of the compositions and mergenece of privielge, and those are resolved in algebra way. In addition, it provides a privielge content management that stores privilege definitions in unit, keeping the consistent privilege definition across the privilege content. Both Privilege Calculus and the Privilege Content Management are designed so that the administrative extensibility and administrative scalability are easy grounded in complex enviroment.