Construction industry became huge and complicated as the time went by. It has been so rapidly developed that the construction companies can not survive in the market if the higher technology and scientific approach are not applied. Especially in the field of construction management, it started from the schedule control which simply monitored the work progress, but now it was changed to the integrated construction management covering analysis and forecasting, projected and actual performance management, impact on the project, etc. However, even the integrated construction management has a limit due to the uncertainty arising out of fast track which is a major characteristic of construction industry. So, to minimize the risk of uncertainty, a new concept so-called 4-D CAD system was recently introduced. 4-D CAD system has been applied to design, construction and construction management. The system combines the 3-D CAD system with time management technique that makes it possible to establish the management system with a concept of space, materialize the potential risks, and introduce the life-cycle concept in the whole process covering project initiation, design, construction, completion, commissioning, etc. This paper introduces the 4-D CAD system, reviews the effect and problem arising when applying the system into actual job sites, studies the usage of the system in connection with the conventional construction management system and any improvement, and eventually proposes the method of improving the construction management in domestic projects and of leveling up the construction management technique.