Green roof is one passive cooler way and attract sun ray on roof and inhibit reaching this ray to building .Several studies conducted on green roof effect in building energy during current years .These studies show they can decrease warm energy for warming in winter and act us cooler In summer in this paper reviewed this issue and situation possible energy saving. Green roof also culled garden roof, vegetable roof and inhibit roof is one engineering system that is possible vegetation grow in roof and protect of roof. green roof term refer to one light system created of Pre –made layers and form one unified system by building roof and Vegetable can grow In one special culture in all or part of building.