From a macro level, cloud computing is gathering all the distributed resources originally, and then provided them as a service to the users. Current research focuses the cloud architecture and local small-scale grid computing mainly. The researchers are ignoring to provide a channel to help users to understand the business processes of the entire platform. This paper focuses the communication and business links and abstracts them into business processes behaviors. At the same time, this paper provides a modeling method to help these behaviors being visual depiction at the initial design of the cloud computing.