The main purpose of this study is to comparative analysis on the teacher evaluation system in Korea and U.S.A. It was the good way to reveal and understand the foreign instance of Korean teacher evaluation system that is carrying out the present. To inquire the study questions, a literature research was used in this study. Materials related with the themeis internal and external books, theses and forth. The findings were summarized as follows: First, Korean teacher evaluation system is put at service only materials for personnel administration, but American teacher evaluation system is content in teacher\'s professional development. Second, as the Korean teacher evaluation system have to concretize evaluation standard and write up it as to a active term. Third, Evaluation way is reasonable more absolute evaluation than relative evaluation. In addition, it must adapt to summative evaluation and formative evaluation at the time. It is necessary for the teacher to pre-study and training process for the purpose of understanding the object, the implement and the process of evaluation enforce teacher\' evaluation. Fourth, in Korea, the teacher evaluation results are not open to the teacher but American evaluation results are open to the teacher. Consequently, teacher evaluation has to contribute to professional development of the teachers so that may to make efficiency of education and social position of teacher raise.