Abstract: Offlinc SaaS application is environment-appreciable smart software which can work with discontinuity connection. Currently there are a few research works about the offline Web application. They can't meet the requirements of SaaS, and can't take componentized framework into account. To solve the problems above, OSF (Offhne SaaS Framework) was proposed. Firstly, the structures and mechanisms of operation-oriented component based offline SaaS framework were proposed. And then a case study was introduced to verify the proposed framework. Theories and practices show that offline SaaS application framework promotes the users' experience, enforces the usability of SaaS service, and enhances the applied area of SaaS applications.

Key words: SaaS, Offline application, Component, Framework