Laser scanning technology is a very helpful feature in the construction work of building. A laser is a powerful scanner that can capture the data with size and shapes and convert this to a cloud data point and after it can be uploaded into 3d modelling. it is a method of selection of data of surface with the help of a laser scanner which captures the data of densely-scanned points with precise distance over a given object. In the process of laser scanning technology various precise methods of scanning are used, they describe the terminologies of laser scanning technology. In this the LIDAR process which termed as the ‘light detection and ranging’ is a method for collecting data from a cloud point to the surface. Lidar process is also helpful for generate the 3d images that can be used furtherly for 3D computer aided designing and cad modelling. laser scanning technology is a quicker process that provide the data more accurately and cheap than a conventional survey measurement. The building information modelling is endow the 3d images to the construction work with BIM software that can be helpful for the analysis of work.