The purpose of this study is to seek corrective strategies of issues based on analysis of experience and supportive needs of parents of children with developmental disabilities receiving behavior rehabilitation service. Participants of this study were 12 parents of children with developmental disabilities around Gyeonggi province who have been recipients of behavior rehabilitation service provided by qualified BCBAs(Board Certified behavior Analysts) for at least 3 months. In-depth interviews were conducted utilizing questionnaires in semi-structured format in order to analyze both experience and perceptions of behavior rehabilitation service. Based on acquired data, three main themes and ten subtitles were categorized using content analysis. From qualitative analysis, each one of three themes and its relevant subtitles were derived as follows; (1) the first theme of “experience on behavior rehabilitation service”, and its relevant subtitles of “the first meeting of the child and moment of diagnosis”, “treatment experience of my child and current situation”, “desired supportive treatment services”, “difficultly acquired behavior rehabilitation service”, “in search of behavior rehabilitation service centers”, and “experience of evidence-based behavior rehabilitation services”, (2) the next theme of “perceptions toward rehabilitation service”, and its relevant subtitles of “behavior change of children experiencing service”, and “expenses on behavior rehabilitation service”, and (3) the last theme of “supportive needs for behavior rehabilitation service”, and its subtitles of “reasons on others’ recommendation”, and “corrective needs to behavior rehabilitation service”. The result of this study can be utilized as a foundational resource to suggest future successful behavior services.