This study has the purpose to recognize the necessity of the research on Green Home IT technique for the saving of Green Home energy and providing of user-centered comfortable environment services and propose Green Home application method based on user recognition and location recognition techniques. To that end, energy-saving techniques that can be associated with IT technique among the ones applied to Green Home were deduced, and the method to apply Green Home user recognition and location recognition was proposed through theoretical examination of user recognition and location recognition, discussion on Green Home, selection of user-recognition technique and location recognition technique for Green Home and case analysis of Green Home based on literature study and case analysis. The proposed Green Home that adopted user recognition and location recognition has the purpose to reduce energy while managing energy efficiently by providing intelligent, automatic indoor environment that users require in the space where users are located based on various personal information and location information of user.