The purpose of this study is to examine the professionalism and support needs of teachers related to the diagnosis and placement process of students with learning disabilities in the special education support center, and to propose improvement plans for efficient operation based on this. A total of 25 answers was collected through questionnaire, and the data were analyzed for result. The results of the study suggests as follows: First, teachers recognize that the diagnosis and evaluation of learning disabilities is not progressing well, and related expertise is insufficient and the criteria for determining eligibility are recognized as being absent. Second, regarding diagnosis and evaluation, the level of self-awareness of professionalism is low, but it can be confirmed that they are collecting the latest information and participating in the training with a sense of responsibility for their work. It was suggested that demands and opportunities for high-quality training should be expanded and criteria for determining eligibility should be established. Based on the findings, in order to support students with LD, comprehensive approach and educational support for eligibility rather than diagnosis are needed.