A harmonious society starts with a harmonious family, a harmonious family starts with qualified parents, and qualified parents make qualified children. Family therapy is a form of psychotherapy, the object of treatment is not only the patient himself, but through the promotion of understanding within the family members, to enhance emotional communication and mutual concern, so that each family member understands the pathological emotional structure of the family, in order to correct their common psychological pathology, improve the family function, produce therapeutic effects, to achieve harmony, the purpose of normal development. Since the family is a functional unit of society, it has the closest relationship with each family member. The personality, values, and social adaptation patterns of each family member are all formed under the influence of the family. Family members interact closely with each other and exert positive and negative influences on each other. However, family dysfunctions, such as poor family leadership, unclear family boundaries, interfering outsiders, tormenting each other within the family, distorted family relationships, single-parent families, reorganized families, foster families, loose families, lack of concern for each other, difficulties of middle-aged and elderly people, and different family communication patterns, can make all family members involved in family disputes to different degrees and occupy a part in the pathological family relationships. This leads to a variety of pathological emotional and behavioral disorders. In family therapy, three basic principles must be adhered to: 1) Group therapy for the whole family to correct the shared psychopathology; 2) The problems of the “diagnosed patient” are merely symptoms, and the family itself is the real patient; 3) The task of the family therapist is to make each family member understand The task of the family therapist is to make each family member aware of the family’s pathological emotional structure and to improve and integrate family functioning.