Cloud can supply a server infrastructure to achieve e-utilities requirements that can be easily paid on demand to meet specific customer needs and business success. It supports dynamic resource allocation in accordance with service level agreement policies and reuse of the IT infrastructure at the higher utilization level, and handling the management from the network edge to application and data servers. Meanwhile, the real time configuration can reduce time and cost and advance service reuse efficiently. This paper presents an EBS (Enterprise Service Bus) based framework that integrates the XML packaged legacy system resources into the Cloud service environment. The required resources are defined and building the Cloud services based on ESB components. The work on how to implement the integration has been discussed in this paper.The ESB(Enterprise Service Bus) based integration architecture is proposed, which combines the advantages of web service techniques including WSDL (Web Services Description Language) based on SOAP (Simple Object Access Protocol) to build the interface defined by WSDL.