石墨烯因其出色的电学、力学、热学、光学特性引起了全球研究热潮。作为超材料和变换光学平台，我们有必要计算它的电导率。-Because of Graphene s excellent electrical, mechanical, thermal and optical properties,it caused the global research boom. As the platform of metamaterials and transformation optics , we need to calculate its conductivity.