Cloud: Complex Adaptive Service System

This paper analyzes relevant theory, also known as the complexity science. On the basis of comprehensive analysis to service-oriented systems and cloud computing solutions, it reveals some behaviors and phenomena that are difficult to be explained by traditional information science methods involved in the continuously developed cloud computing environments and proposes complex adaptive service systems CASS. It uses Multi-Agent Based Modeling method to create a cloud environment prototype based on CASS principle and designs a multi-agent model for the subject behavior rules in CASS so as to reveal a behavior rule which can help to quickly promote similar service (subject) classification aggregation in the cloud environment.