Abstract: The energy efficiency management system is a system that remotely monitors and controls the energy consumption of homes and buildings, collects and analyzes monitored energy related information and performs integrated management related to energy efficiency through simulation. In order to construct such a system, communication and control measures between energy consuming devices including energy consumption unit, major household appliances and communication method between remote and energy consumption points and simulation and software development are required. In this study, an energy efficiency management system was designed. In the ICT environment, remote monitoring and control facilities were used based on automation equipment such as PLC and DCS (Distribute Control System). It was designed and implemented a real time monitoring system by linking smart I/O interface with HMI (Human Machine Interface) Software package for PC. The PLC is connected to the server and the PC is connected to the client to run the system.