This article examines a series of “tongzi”(同字) in Nam-sun Choi’s New Chinese Dictionary(新字典) published in 1913. “tongzies” are the Chinese Characters which have considered as same words because they have almost the same meaning and sound but slightly different shapes from orthodox written forms. In order to uncover Choi’s implicit intention and underlying interpretative strategies in New Chinese Dictionary, I firstly processes all the data by computer and compiles the database. Secondly, I extract 3053 characters explained as “tong(同)”(the same) in the dictionary and analyze their interpreting systems, methods of classification, structural features, etc. Finally I add all the cases of “tongzi” and their character structures in the appendix for the convenience of related studies.