The purpose of this study was to analyze present condition of science performance, 3 major fields of science performance, science top performers (%), 3 major fields of science top performers (%) and enjoyment of science in PISA2015 participating countries and define correlation among research items. The results were as follows. First, science performance average of PISA2015 participating countries were 476.9, the score difference between high science performance countries (average 510.4) and low science performance countries (average 435.4) was 75.0. Second, science performance of PISA2015 participating countries were expected to performance of 3 major fields of science and percentage of top performers in 3 major fields of science 76.0-99.7%. Third, percentage of agreement on enjoyment of science was reported 64.0% in PISA2015 participating countries, 61.2% in high science performance countries and 67.5% in low science performance countries. Fourth, for the correlation among science performance, 3 major fields of science performance, science top performers (%), science top performers (%) in 3 major science fields, and enjoyment of science, PISA2015 participating countries showed negative correlation, while high science performance countries showed low correlation and low science performance countries showed strong negative correlation.