This study tries to develop a classification of social welfare services utilizing a social welfare legislatures classification system, and to classify social welfare services for people with disabilities with the social welfare services classification. The dimensions of the social welfare services classification system consist of needs and legal relations. The former include attributed need, compensational need, and assessed need, while the latter include causal and purposive relations. With the two dimensions, there are 6 possible types of social welfare services, but there are only 5 types of social welfare services since attributed-causal services and compensational-causal services are the same type of services. Attributed- causal services are universal in that all the citizens may use the services, but service recipients have to pay for the services. Attributed-purposive services are universal, and service recipients use the services for free. Compensational-purposive services are selective in that service recipients must contribute to the society to be entitled to the services, and service recipients use the services for free. Assessed-causal services are provided based on need assessment on individuals, and service recipients have to pay for the services, while the service recipients of assessed-purposive services use the services for free. The social welfare services classification system in this study will help to analyze and understand the characteristics of social welfare services from the service users’ point of view.