Abstract: Objective To explore the significance of Community Mental Health Service funded by the government, organised by the Health Department and participated by the Community Psychiatric Service, which consists of community case managers, policemen, community health station, doctors, nurses and family of patients.Methods 150 patients, having the tendency to cause trouble or disturbance in their psychotic episodes, were placed in a case management system, monitored and treated throughout the year, gathered statistics for their number and extent of violence every month, and scored according to Social Disability Screening Schedule (SDSS).Results After one year's monitoring and treatment, the total number of occurrence of violence 5 grade among the 150 patients decreased from 20 person-times to 0 person-times; violence 4 grade decreased from 68 person-times to 2 person-times; violence 3 grade decreased from 66 person-times to 4 person-times; violence 2 grade decreased from 258 person-times to 12 person-times; violence 1 grade decreased from 432 person-times to 24 person-times. The number of patients who lost their violent tendency increased from 0 person-times to 72 person-times.Conclusion To establish community case management systems, monitor, treatment, conduct follow-up studies and providing appropriate recovery guidance for schizophreniac patients through the Community Psychiatric Service, are the effective ways to decrease the rate of causing trouble or disturbance, reduce the patients' social disability, and facilitate the patients' recovery of social functions.

Key words: case management system, schizophrenia, community monitoring and treatment, risk assessment