The purpose of this study was to assess the difference in learning achievement between the local children and the new-immigrant children in Taiwan. A large-scale database analysis and meta- analysis were adopted to analyze. TASA data which taken from four, six, eight, and eleven graders from 2007 to 2013 were adopted as the large-scale database. Fifty-nine research papers were used for coding as a meta-analysis. This result was in good consistency with both analyses. The Taiwan local children’s learning performance is better than new-immigrant children’s. However, there was some discrepancy between performances. In addition, with the students’ age increase, the difference in the performance became smaller. The advantages and disadvantages of both study methods were discussed as well.