The purpose of this study was to propose the development of the National Competency Standards (NCS) by defining the standard jobs requirements for general clinical sites, along with the implementation of developmental rehabilitation services in the field of art therapy. For that purpose, job classification, job overview, industry status, education and training status, etc and so on. were investigated and analyzed according to the procedure of the NCS development manual. As a result of the study, the job classification should newly establish a major category of social welfare/religion, a middle category of counseling, and a small category of art therapy. The job outline was “Using art as a visual artist to familiarize with the scope of tasks (e.g., diagnosis, treatment plan, treatment, treatment evaluation, supervision, etc.) to help children, adolescents, and people who are suffering from stress and trauma in a social environment with psychological difficulties.” According to the industry status, 15,957 businesses and 123,657 people were also identified (National Statistical Portal, 2020);, and 1,279 related private registration qualifications were identified. An online survey was administered from August 25, 2021 to September 7, 2021 for a total of 552 art therapists in the clinical field to investigate occupational and job prospects. As a result of the survey, 94.6% and 73.4% of job prospects were expected to increase over the next 5 years. The status of education and training was identified based on six related universities and 26 graduate schools. The results of this study are meaningful in that the contents of knowledge, technology, and quality for performing art therapy job were standardized and proposed according to the systematic procedures required by the country.