Abstract: This paper starts from the Google App Engine (GAE) and makes deep analysis and study of its datastorage technique (Bigtable).And on this basis,aprototype system is designed and implemented,which Based on the object-oriented thought,using the Struts+Spring+Jsp development framework,using the Google App Engine development technology.By developing the prototype system as well as deploying and testing of the cloud,we analyze the performance of the prototype system.On this basis,put forward the suitable for the characteristics of SaaS software developed by cloud platforms and the problem should pay attention in the development process and present the author's view that,in the early stages of the development of cloud computing,in the cloud is only suitable for development and deployment of high scalability based on request/reply does not involve multiple tables associated with simple Internet application system,storage system and the intelligent decision-making system need high efficiency calculation.