Recently, CALS/EC is quickly promoted with a development of information technology. CALS/EC aims at an increase in efficiency of business by carrying out an information exchange, cooperation, share, and reuse for digital results in the process of the life cycle of investigation, plan, design, construction, and maintenance management in public works. In CALS/EC, it is observed about a utilization of 3D information for CAD or GIS. In order to promote CALS/EC in the future, it is very important to utilize the 3D information. The purpose of this present research is a reference investigation about the practical utilization of 3D information in construction industry. Moreover, the present condition of practical utilization of the 3D information on construction industry was analyzed.