This paper gives the definition of reverse engineering and the process of reverse modeling software - imageware. Using imageware, we complete the reconstruction of the human body surface from point cloud. The main works of this paper are shown as: point cloud pre-treatment, point cloud blocking, contour curve creating and surface reconstruction, as well as the surface evaluation of the model. The evaluation result shows that the surface error is in line with the required precision. This study may provide references for related research in CAD modeling.