There were overlaps of symptoms between depression and anxiety disorder. Depression with anxiety symptoms, anxiety disorder with depressive symptoms were very common phenomenon. There were three points in current domestic and international research for the relationship of these two types of diseases:(1) monism:continuum theory, anxiety and depression were the same disease in different forms; (2) two sub-theory:anxiety and depression were two different types of diseases; (3) comorbidity:when anxiety and depr...