The Smart Data Center Energy Expert System is a continuous monitoring, control and analytics platform developed by the needs of modem data centers for down time prevention powered by latest IoT and cloud technologies. The expert-system approach enables fast and accurate identification of environmental trends along with comprehensive and cost effective energy efficiency recommendations, boosts adoption of energy saving measures and automatic CRAC controls. The all-in-one system significantly simplifies and standardizes savings estimation and verification and effectively sustains and improves the savings over time for medium to large data centers.