surrounding environments information on gas station and or information on price of apartment in driver 39 s view are to be displayed when a vehicle is travelling using augmented reality the first optical module 110 is turned off and only the second optical module 120 is operated to allow only 3d image b to be projected on the window shield 10 for view by a driver as illustrated in fig4 and 5 at this time depth d of 3d screen can be pulled upward or push hud backward about a driver for image data processing in terms of software such that there is no need of moving a virtual image by physically moving a separate mechanical configuration and therefore it is possible to adjust a position and a depth of a virtual image through image data processing in terms of software thus the driver is enabled to form an information window at an appropriate depth by positively adjusting a position of a virtual image furthermore when a voluminous 3d image is used a navigation screen may be formed using a 3d figure such as a depth sensible arrow as illustrated in fig8 and 2d information and 3d information can be separated for selective view by the driver furthermore when a complicated navigation screen or travel information of a vehicle is to be checked by selection of a controller or by user selection.