This article analyses the deficiencies of scalability and maintainability of the traditional resource management system from the perspective of the business layer of the system, and to put forward this paper is to develop resource management system. In this paper, the complexity of the business layer is to be re-designed through the design pattern idea, the introduction of a proxy pattern, a simple factory pattern, visitor pattern, double dispatch pattern and strategy pattern makes file exchange system the indirect interactions of function module components and resources processing algorithms. Functional modules of the business layer through configuration information call the appropriate components to complete a business, so that each business is no longer a direct link between the components, so a business component of the change will not affect the other business group pieces. With this development approach is basically to achieve the open-Closed Principle (OCP), reducing the system's coupling to increase the reusability of the system modules, and to build a scalable, easy to maintain business systems.