The present research investigates the development of blind children and adolescents' drawing simple, solid, and geometric object/s. 22 congenitally blind participants, ranging in age of 5-19 years, were students of 2 public schools in Taipei. 20 of them, totally blind with no light perception, were all qualified students from a public school for the blind children and adolescents in Taipei. The rest two subjects, light perceiver, from an ordinary public elementary school in the same city. The research includes 3 ”drawing from observation” tasks, 2 ”judgment from obscrvation” tasks, one ”matching” task. All subjects participated each task individually under well-controlled conditions. There is no time limit of any task. The main results suggest that: (1)The strategies frequently adopted by the subjects are ”mixed viewpoints”, ”unconnected local features”, ”connected local features”, and ”ideal viewpoint”. (2)The results reveal 5 developmental stages: At the first stage, there is no spatial order in the drawing. Only scribbling in the drawing. Secondly, the subjects depict local features that construct the spatial quality of an object. The third stage is a stage of differentiation. The variety of local feature is represented. The subjects are not capable to integrate the relation of all facets reasonably. At the fourth stage, drawing image is refined, and facet shaped by closed line is shown. The subjects are trying to connect the local features together, but not successfully. At the final stage, spatial features of the object/s are connected logically. Orthographic projection system is used frequently. (3)Although it is hard to make powerful prediction statistically because of small sample size in this research, the developmental changing in the drawings is obvious. Age 6 and age 13 are critical period of development. Before age 6, feature of object is not represented. After age 13, features of objects are organized in a way that is also adopted by sighted people. (4)There is no sign of using oblique projection system or perspective. The finding is against Kennedy's suggestion. (5)The drawing development found in the present research is similar to the development of sighted people from the viewpoint of differentiation and refinement. However, lacking of visual experience slows down the development speed, and probably cut off the more advanced stages which most sighted people can reach.