The halfway houses offer caring, social support, social participation and employment service for the mental disabled who needed. The halfway houses take as an important part in mental disabled service system. A case of professional services for the mental disabled is analyzed in this research. The research findings include: 1.the professional service offered by the halfway house is function for the mental disability. 2. Social support and social interaction skill training are the most important courses for the mental disability to keep on employment. Finally, several professional service issues and suggestions are discussed by the authors.