Abuse is a family disease, which requires joint treatment of family members. Family is an important part of the diagnosis and treatment chain of alcohol and substance abuse. Abuse of alcohol and substance is a response to fluctuations in the family system. In consideration of interactions within the system, it seems an important requirement that the clinician involves, and maintains the presence of, the family in its entirety in the treatment process. A family often needs as much treatment as the family member who is the abuser of alcohol or a substance. In this regard, participation of the family in the treatment process as group members and by assuming a supportive role are assets in terms of preventing relapse, and extending clean time, and also very important for solving conflicts that give rise to abuse of alcohol or substances. Accordingly, it is important to know the family structure and its role in the treatment process. This article covers a review of family systems separately in terms of alcoholism and substance abuse.