Depression has been a common comorbidity and reduces the quality of life, the poor glycemic control and consequently worsens the diabetes course. The goals of this systematic review are searching of a population who have higher mental disorders in type 1 and 2 patients with diabetes and if there is a direct relationship between glycemic control and psychiatric disorders in this population. A total of 2527 references, review and review articles were excluded, 19 scientific studies were selected: 9 cross-sectional studies, 6 prospective observational studies, 3 retrospective observational studies, and 1 case-control study. Depression and anxiety have a high prevalence in subjects with diabetes. Therefore, the relevance of this study is showing that those mental disorders have a direct correlation in both types of diabetes treatments and decrease the quality of life. Also, the rates of depression could be up to three times higher in patients with type 1diabetes and twice as high in individuals with type 2 diabetes compared with the general population. Patients live in fear of complications from diabetes over the long term and also have damage due to the high psychiatric comorbidity of these chronic patients.