Introduction: With the psychiatric deinstitutionalization and consequent restructuring of the mental health services, it is increasingly emphasized the need for evaluating services from the Network for Psychosocial Care. Given the complexity involved in health systems and mental health, evaluation is considered essential for quality assurance of the services. The World Health Organization (WHO) emphasizes the need to incorporate the assessment of treatment outcomes as a continuous and ongoing practice, using assessment data to improve quality of care. Objective: This study aims to evaluate quantitatively the structure, work process, the organization of mental health care and outcomes of mental health care provided by the Psychosocial Care Center II for alcohol and other drugs (CAPSad) from the city of Botucatu. Method: The study was conducted in a CAPSad in Botucatu. To collect the data four instruments (coordinator , worker, family and user) were administered to the participants. Those instruments were composed by " Satisfaction Scale-SATIS-BR " Perceived Change Scale (EMP) and the Scale of Attitudes Towards Alcohol , Alcoholism and alcoholic (EAFAAA). The instruments were also composed by sociodemographic data, service structure, human and material resources and the use of alcohol and other drugs. Descriptive analysis of the data was performed using the software Statistical Package for Social Sciences (SPSS) version 20.0 for Windows®. Results: The sample consisted of 01 coordinator, 19 workers, 25 users and 15 relatives. We obtained high levels of users and family satisfaction, and intermediate levels of satisfaction for employees with respect to the evaluated service. Regarding the perceived change, the data showed high percentages of change for both users and for family. On a global question about improvements, 100% of the families noticed an improvement in the overall life of their relatives, when comparing to the beginning of treatment, and 88% of the users noticed the occurrence of improvement in their treatment. The data showed a tendency toward negative attitudes of these workers towards alcohol, alcoholism and alcoholics because for most means of factors remained in the intermediate zone. The results highlight the need for investment in training and extension courses for professionals and the need to improve specific points regarding the service infrastructure. As this study was conducted in a single mental health service, this results cannot be generalized to other services .