At present, the proposal of SaaS makes network application more and more popular. However, in the process of users use network application, network congestion occurs frequently, causing network connection to be cut and to be connected instantly. In order to ensure the normal operation of the system, the offline application in SaaS architecture must be developed. This article takes the example of navigation mark business management system; it combines SaaS architecture into traditional MVC pattern, and offers offline application of the navigation mark business management system. This system solves the problem that the system can’t work offline.