With the increasing complexity of modern construction projects, there is a pressing need on higher degree of assistance from computer in order to accomplish effective planning and management. In this work three-dimensional computer modeling is analyzed, describing his and in disadvantages in comparison with two-dimensional modeling, and an opportunity application in designing construction. In this work the 3D computer – aided modeling and it’s the usage in construction are analyzed. As result’s the new attitude of building design and implementation are presented. The 3D computer – aided usage in all construction life cycles is made and advantages are given.