Hospitalization is usually required for patients with moderate and severe depression. Depression is a relatively common psychiatric disorder and is classified as mild, moderate or severe according to the severity of the illness. Patients with mild depression tend to have mild clinical manifestations and can be better treated through self-adjustment at home, psychotherapy or outpatient treatment. Patients with moderate and severe depression are often accompanied by self-injurious and suicidal thoughts and behaviors. Patients are at a higher risk of threatening their bodies, so systematic and standardized inpatient treatment is recommended. During the inpatient treatment, medication, psychotherapy and physical therapy can be given to be able to achieve maximum systematic, standardized, adequate and full course of treatment. In addition, patients with mild depression, after outpatient medication, should pay attention to regular review and adjust medication dosage according to their condition to avoid relapse.