Chunghwa Telecom cloud data centers around Taiwan provide large capacity of cloud computing and data storage. For the purpose of integrating, managing, and monitoring all cloud computing resources, Chunghwa Telecom had developed a Cloud Argus System in a centralized Cloud Service Operation Center for monitoring all cloud data centers. Cloud Argus system integrates power, facility infrastructure, network and cloud devices operation support systems into a single system platform. In terms of operational objectives, Cloud Argus system integrates information notification, unified resources management, and provides remote management processes. The proposed system helps operators in network operation center (NOC) manage the quality of service for both cloud computing and Internet Data Center (IDC). Currently, this system is already running on line to support day-to-day operations of CHT Cloud Service Operation Center.