The Social Welfare Department provides residential treatment service for mal-adjusted children and juveniles and young offenders through social work intervention to give effect to the directions of the courts. To improve service quality and provide better integrated training to the juveniles and young offenders, the Social Welfare Department has in 2007 by phases co-located six correctional and residential homes to the new purpose-built  Tuen Mun Children and Juvenile Home which serves the functions of a place of refuge, a remand home, a place of detention, a probation home and a reformatory school.

The Tuen Mun Children and Juvenile Home is a gazetted Home. It provides temporary custody and residential training to children and juvenile offenders under respective ordinance-

Academic and vocational training programmes are provided to residents with varied duration of stay to meet their educational needs and to enable them to pursue further studies and/or open employment upon discharge from the Home.

The Home's social workers provide social casework to understand residents' problems and to help them settle down in the Home. They also liaise with their parents/guardians and supervising caseworkers/ probation officers to work out the welfare plans, and to provide group work services to suit their needs. For residents of Place of Refuge and Remand Home, the caseworkers prepare reports to the courts to help the magistrates understand the residents' behaviour in the remand period and decide on an appropriate arrangement for their future.

The Home regularly organizes social skill training and  therapeutic groups to help the residents have better understanding of themselves and enhance their sense of responsibility and social skills. Parents' groups are also organized to improve the parent-child relationship.

Community service projects are regularly organized to help the residents develop a sense of responsibility, and to enable the community to have a better understanding of them.

Recreational activities are organized for the residents to develop healthy leisure pursuits.

Parents or guardians are encouraged to visit their children in the Home. For residents of the Probation Home and Reformatory School, they are granted home leaves for family reunion at regular intervals.

The Home provides 24-hour nursing service for the residents. The visiting medical officer and the Home's nurses look after the residents' health.  For residents who require specialists' consultation, they will be referred to specialists for medical advice and treatment. And for residents who need psychological assessment and treatment, they will be referred to the Clinical Psychologists of the Department.