Computer-aided design (CAD) poses a brand new change of environmental art design from concept to skills. Nowadays, computer operation is a must for environmental art design, and no one can ignore such a powerful trend. This is transition period from traditional manual design mode to advanced computer design mode, and now we are standing on top of this new start point. CAD has fully performed its charm and become an indispensable tool in the field of the environmental creative art design. Mastering relevant software has become an essential skill for designers. However they often feel lost in current complex computer software, or even when they have conquered software technology difficulties, still trapped into a hard-pressed embarrassment to combine design with ideas. This dissertation starts from CAD definition, discusses CAD development and its own characteristics, and further on CAD applications in environment art design, main types and functions in current CAD software. The end of this article also gives an outlook on future effects and scheme a better vision for CAD in environmental design.