Abstract
On this study we suggested "Regional Microgrid" and "Building Microgrid" for the energy infrastructure utilizing renewable "New Energy". And for the purpose of estimating the energy conservation of "Building Microgrid", we simulated the annual energy comsumption utilizing "Building Microgrid" . As a result , we estimated 15.5% reduction of the annual energy comsumption and 29.7% reduction of carbon dioxide discharge.