The appearance and evolution of SaaS over the recent years is potentially one of the major advances in information technology. However, if SaaS is to achieve its potential, there needs to be a clear identification and understanding of the various issues involved, both from the perspectives of the providers and the consumers of SaaS technology. While a lot of studies are currently taking place in the technology itself, there is an equally urgent need for understanding and researching the business-related issues surrounding SaaS service. As more and more individuals and companies use the SaaS service, their concerns are beginning to grow about just how safe and reliable an environment it is. For successful implementation of SaaS service, it is necessary to establish the certification systems to ensure safety and reliability of SaaS. This paper provides the safe and reliable framework for systematic SaaS certification systems. In order to develop it, the critical issues related to service quality and certification of SaaS service are identified and the systematic framework for certification systems of SaaS service and service provider domains are developed. A evaluation methodology for the developed certification systems is also proposed.