System and methods for reducing standby power and monitoring electric energy consumed by home appliances and home network devices

PURPOSE: An energy consumption monitoring of home appliances and home network device, a standby power saving system, and a method thereof are provided to save the energy by shutting down communication standby power effectively. CONSTITUTION: More than two energy saving nodes(200) are connected to a home appliance(300). The energy saving node allows or blocks the power to the home appliance by detecting power consumption of the home appliance. An energy saving server(100) is connected to each energy saving node. The energy saving server collects all kinds of the status information from the corresponding home appliance including the energy saving node and the power consumption.