The purpose of this study is to examine effect next rooms from hot air of greenhouse in winter and measures of rising in greenhouse temperature in summer, and regional differences of saving energy effect of attached with greenhouse, to estimate room temperature by model of thermal circuit. In winter, the next rooms temperature of the greenhouse rise, opening door and jalousie of the greenhouse by daytime. Irradiance is many and hours of sunlight is long at region that is expected saving energy effect by attached with greenhouse in winter. At all analyzed regions, greenhouse temperature is equal to atmospheric temperature, if the sunshine is obscured by blind inside the greenhouse and planting with morning glories outside the greenhouse at the same time in summer.