There are certain advantages and disadvantages of orthodontic treatment for adults. The advantage is the timely correction of occlusal disorders, avoiding the increased likelihood of periodontitis and dental caries due to crowded teeth. It also improves the stress on the temporomandibular joints (TMJs) and prevents the development of TMJ syndromes. However, the disadvantage is that the maxillary and mandibular jaws have already developed, and the force applied to the teeth at this time is basically small, and the teeth can only undergo relatively small movements, and if too much pressure is applied, it is likely to lead to irreversible resorption of the alveolar bone. After orthodontic treatment, the time of wearing the retainer should also be appropriately extended to avoid the teeth gradually recurring occlusal disorders after orthodontic treatment. Orthodontic treatment for adults should be based on their own conditions. If the bite disorder is more serious, the treatment will be more favorable than unfavorable. If the occlusal disorder is mild, it is likely that the treatment will do more harm than good, and the patient needs to make his choice carefully.