The philosophical concept, One Divided by Three, was put forward in 1960th. Since late 1970s, the research about the theory of One Divided by Three developed in academian area in the process of controversy. The theory of One Divided by Three was widely applied in many disciplines, which is represented by the indepth study of scholars Pang Pu, Lei Zhengliang, Zhou Deyi. However, further research is still needed to improve the theoretical system of One Divided by Three.