The predictive validity of three admission indices, HSG(High School Grade), SAT(Scholastic Aptitude Test) and MEE(Main Entrance Exam), was evaluated by an ANCOV A model with the GPA(Grade Point Average) as external reference. Main results from the year 1994 and 1995 at the Korea University are 1) HSG was the most important index and MEE was running up, and 2) 1994 SAT seemed to have no influence for future academic achievement, but 1995 SAT showed significant improvement in humanity-social science field. Among MEE sub-indices, 1) Korean with essay-writing and Second foreign language were important sub- indices for humanity-social science majors, while English and Mathematics showed no relevance, and 2) Natural science was the most important sub-index for science-engineering majors, while Korean with essay-writing, English and Mathematics showed moderate relevance.