Provided is an orthodontic treatment method using an aesthetic guideline. The method includes expanding anterior teeth or other teeth such that front lines of the anterior teeth move to a front side of the aesthetic guide line corresponding to a virtual line obtained by connecting a first skin point to a second skin point located in front of a pogonion aligning the anterior teeth or the other teeth from a first angle to a second angle such that central tangent lines of the front lines of the anterior teeth are parallel to the aesthetic guide line and retracting the anterior teeth or the other teeth such that the central tangent lines of the front lines of the anterior teeth overlap with the aesthetic guide line or are located at an inner side of the aesthetic guide line.
