a drawing management device for managing the drawing of an entire facility , such as a water supply facility , as digital information . this device includes a unit for storing drawings with priorities obtained by separating the entire facility drawing into sub - facility drawings located at plural levels , a selective display designating unit for displaying a desired sub - facility drawing obtained by selecting the number of levels considering the priority from the storing unit , and a display unit for displaying the desired sub - facility drawing in response to the signal from the selective display designating unit . by suitably selecting a desired level considering the priority , only a necessary and sufficient facility drawing can be displayed swiftly .