The prevalence of comorbid depression in patients with epilepsy is as high as 30-50%. The depressive symptoms severely affect seizure severity and quality of life in patients with epilepsy. The aim of this study is to register the diagnosis and treatment for depression in patients with epilepsy from the East China, determining the incidence rate of comorbid depression in patients with epilepsy and the choices for the antidepressant treatment. At the same time, neuroimaging data such as brain MRI and blood sample will be collected to analyze some biomarkers for the comorbidity of epilepsy and depression.