The technology of Cyber-Physical System has attracted highly attention of academia, industry, and news media. There are still many open issues in the definition, architectures system models, security architecture of Cyber-Physical System. Define Cyber-Physical System and its meaning firstly, and then introduce the architecture and the progress of Cyber-Physical System research; and also analysis security services of CPS based on the time and space scales; lastly put forward the CPS system security architecture and detailed analysis of the layers of security threats and discuss along with possible solutions. http://www.sjie.org/paperInfo.aspx?ID=295
