As a medical software industry develops in a variety of its fields, the studies on medical software using 3D a virtual model are also being constantly conducted. In orthodontia, one of the fields where the 3D virtual model can be applied, this 3D virtual model is used to simulate treatments of orthodontic patients through several stages of tooth movement, ranging from initial malocclusion to final malocclusion. The set-up model is made into the most ideal treatment objective. This set-up model forms the foundation in manufacturing transparent and thin overlay equipment. It is esthetic and easy to use, so a number of patients prefer to use it. However, there have been few studies on it, and the satisfaction level is not so high because of high cost and much time for checking out their treatment process. In this paper, we propose a 3D orthodontia system to raise the satisfaction level by providing the patients with a simulation and a set-up model in improvement in high treatment expenses and on all the processes in advance through exact and scientific diagnosis materials.