This stdudy intended to analysis the achievements of science education in primary, secondary and high school in Korea and Japan based on the IEA(the Internationl Association for the Evaluation of Educational Achievement) data. Advancing in school level. Korean students were inferior to Jatopanese in Science achievements, especially much more in comprehension, application than knowledge aspect. This results were roughhly discussed in relation to the environments of science edecation and the evlation systems.