Study the linguistic and cultural minority nonginui language for interaction with the culture through the study found Deaf Korea and, therefore, to widen the understanding of consumer welfare center that was aimed to contribute to. In order to achieve such goals, especially qualitative research methods "insider perspective" the best technology that can reveal whether culture was created, 15 years of professional experience in the field through an interpreter were collected. Specifically, data were collected from the field notes, participant observation, in-depth interview was over. Taken together the results of the study, Deaf 'visual world' because of living in the 'Sign Languege' is recognized as a First Laguage. On the other hand, hearing-speech and language, language is seen as a second language. Deaf generally excellent observation is characterized by a wide field of view. And Deaf hobbies, basic etiquette in daily life, including the 'listening culture' versus the 'viewing culture' could be found. Deaf singularity in the interaction times around the Deaf cummunity in close solidarity with the "horizontal relationship" that is formed. But the social use of language differences and cultural minority Deaf due to differences in family life, social life was to experience several difficulties. Conditions and requirements for this through the analysis of the overall Deaf discussion for a social work practice are presented.