SaaS software model is opposed to the traditional software model, which is purchased and installed on personal computers. SaaS is growing exponentially and numerous enterprises of all sizes can generate major performance improvements and cost savings through its application. This kind of application is a far more attractive economic model than the perpetual license model. The goal of the autonomic management is to develop applications and systems to manage themselves based on high perspective guidance from humans. There have been many challenges to research and development of autonomic algorithms for the QoS improvement and evolution of the SaaS applications. And the SaaS adaptability to changes of the environment and requirements are enhanced accordingly. Moreover, the performance of the SaaS system and the ability to control the SaaS services can be improved by sharing the workflow among SaaS Modell.