Abstract— Experiencing hospitalization and illness is an important event that affects the child 's development process. However, pediatric hospitals do not fully consider the child patients’ adaptation as they mainly focus on the treatment and prevention of disease. Therefore, Robot 'Mun' was proposed to help children's treatment process in order to provide a pleasant hospitalization experience in the children's hospital. In order to develop a robot for children certain supplementation sequence trial should be made in advance. Subsequently, Human–Robot Interaction (HRI) trial was held to actualize the Mun robot development process. Referred as HRI Human–robot interaction stands for the study of interactions between humans and robots. Human–robot interaction is a multidisciplinary field with contributions from artificial intelligence, human–computer interaction, robotics, natural language understanding, design, and social sciences.