Abstract: After review over the development of the virtual engine cabin, a new method was presented based on the full utilization of the advanced CAD technology and virtual reality technology. A frame for walkthrough was devel oped and the key technology was discussed. Meanwhile, virtual walkthrough of certain marine engine cabin was developed based on the method, by which, architects could accept opinions that feed back by the clients so the design could be modified and thus the design cycle time could be shortened. And the seamen could be acquainted with the arrangement of the engine cabin so as to improve training efficiency and save the training cost.