Cloud computing is known as the most anticipated technological revolution over the entire world. Cloud computing has lead the entire IT
economy and industry to change.Meanwhile more and more people are concerned about cloud computing’s security issues. Carrier operator gradually from public cloud supplier to many different territory such as private cloud deposit cloud mixed cloud and so on.What are the risks when cloud computing coming. The carrier operator can take what measures to prevent safety risks. This paper investigates the key account’s safety requirements for different type cloud computing.