Abstract: Cloud Computing is a new application model for decentralized computing which can provide reliable, customized and maximum number of users with minimum resource, and it is also a important way to carry out Cloud Computing theory research and practical application combining with other theory and good technictues. This paper summarized cloud computing concept, discussed cloud computing advantage and problem, compared different technology and got characteristic of cloud computing, analyzed the architecture of cloud computing, introduced different cloud computing service,presented a survey on service and architecture aspects of cloud computing, analyzed the relationship between service and architecture, summarized related research about relationship of service and architecture of cloud computing. This paper also presented a summary of the current art of the state of cloud computing, a discussion on the future researches topics and some crucial problems which should be solved pressingly.

Key words: Cloud computing,Testing,Web service, Grid, Simulation