Programming education can improve problem-solving skills and logical thinking required in a knowledge-based society. However, most conventional programming education spent more time to acquisition of command language and coding process rather than improvement of problem-solving skills and logical thinking, for using programming languages based on foreign language and learners have appeared to lost interest easily. To solve these problems in this paper, interest in programming study was enhanced by making it possible to verify the outcome of highly abstract programming process through a robot as a concrete object. In addition, the Hangul converter of robot programming language based on RCX that elementary school students can use easily was designed and developed. Furthermore, the developed tool was used for six months by students in after-school computer class and therefore learners showed a positive response.