It is the ideal goal for the realistic visualization to be accomplished for spatial solids with 2D presentation in digital technology. In the consistently parallel system with the viewing angle and the presenting angle, a technical term, the real presentation rate, is put forward with two indexes, clarity and tri- dimension, taken as an initial criterion of the degree to which the real presentation is reached. By using the projecting geometry, the transform matrix of two-dimensional presentation for the solids was obtained with three steps, for simple and convex body. For more intricate geometric body with concave surfaces, the furry pattern discrimination was introduced, proving that the optimum presentation is that by which the normal iso-axial viewing was adopted. An application has shown that the furry pattern discrimination method worked well, and the trend is the same as the best presentation of an object on 2D among a variety of the solutions.