Nanoscience and nanotechnology provide gargantuan opportunities to engineers the properties of materials by working in atomic or molecular level. It has not only facilitated to overcome many limitations of conventional materials, but also extremely improved the mechanical, physical and chemical properties of the materials as well. To develop high performance, multifunctional, ideal (high strength, ductile, crack free, durable) construction material, carbon nanotubes (CNTs) show promising role to modify/enhance the characteristics of the conventional construction materials such as concrete and steel. In the paper, a brief on nanotechnology, carbon nanotubes, its application in various field and properties, possibilities and findings of different researchers on CNT is presented. It also covers comparison of carbon nano tubes with other nano materials.