After analyzing the basic concept and method of Aspect Oriented Programming (AOP), the method based on AOP was presented to solved the security validate, permissions verification, log and so on. Compared to the conventional Object Oriented (OO) approach, AOP technology could avoid such problems as tangled code and scattered code, and had obvious advantages in raising the component reusability, optimizing processes and reducing the system complexity. Finally, an integration example of permissions verification in workflow system was provided, and the implement based on AOP was provided too.