Since the introduction of evidence based practice in art therapy, the positive effects of art therapy on clients with medical needs have reported. The Health Technology Assessment is a decisive process for coverage under the Korean national health insurance service. The acceptance criteria for new health technologies are efficacy, economic evaluations and guidelines. The British Association of Art Therapists is increasingly taking central role in conducting a number of studies on efficacy, economic evaluation and developing guidelines through systematic literature review. Stepwise strategies are required for new art therapy medical technologies. Stepwise strategies are as follows. First, researchers must identify art therapy research resources and target research areas. Second, art therapy guideline must be developed to reflect the interests of art therapists in specific clinical fields, service users and medical institutions. Third, a large scale multi-centered study should be carried out by assembling limited resources. Finally, a number of grounds on economic utilities and contributing effects of art therapy produced by investigating economic scale and assessment of cost-effectiveness of art therapy.