Starting publication in January, 1970, Science Monthly is the most important comprehensive science magazine in Taiwan. Before Science Monthly, there are four comprehensive popular science magazines: Everybody’s Science Monthly, Chung Hwa Popular Science, Science Club’s Bulletin and Science Education. Because Chung Hwa Popular Science only published 10 issue, and that Science Club’s Bulletin is for teenagers, we lay special emphasis on Everybody’s Science Monthly and Science Education. Investigating the changes of these two magazines in an all-round way, including their personnel, address, editorial committee and contents, we hope that Science Monthly can draw some lessons from their experience.