Synthesizing Research in Korean Language Education Cho, Jae-yoon As the academy has been developed and complicated, the research results have been accumulated and required to be further studied collectively themselves. Meta analysis has been born as the statistical method of accumulating experimental research. The meta analysis has been consisted of the research problem formulation, data collection, data evaluation, statistical analysis and interpretation, and finally public presentation. In the beginning of meta analysis, standard deviation value of comparable group had been used rather than united standard deviation, but the size effect formula has been used nowadays applying S_pooled. ES_sm = (X_e - X_c) / S_pooled The meta analysis is a useful method as the Korean language education research method. Thus, it is hopeful to actively study of meta analysis research which leads the results which are high reliable and feasible with synthetic positive research data of Korean language education. 【key Words】 meta analysis, research synthesis, research method, effect size, effect size formula, statistic test.