Under visual development platform-visual c ,by using the calculation mode of client/server,by virtue of the strong matrix calculation function of Matlab,based on object-oriented designing strategy,visual operation of fractal dimension computation is actualized.By a high-performance graphic processing system-OpenGL,the function of 3D display of fractal surface and the function of other human-computer interaction are realized.Based on the 3D coordinate measured by laser profilometer,the software successfully analyzes the fractal geometric characters of the coarse surface.