Master Tai-Xu is one of the most important reformers in the modern Chinese Buddhism history. The propositions, practices, and influence of his advocacy, the Engagement Buddhism, have a great impact on both mainland China and Taiwan after 1949. As a research of psychobiography, this article tries adopting Carl Jung’s viewpoint of archetype to analyze Master Tai-Xu's religious archetypes from his biography, furthermore, to discuss the interaction of his religious archetype and his Buddhism viewpoints in different life stages. The analysis is starting from his longing for immortal archetype, followed by Buddha archetype after his enlightenment, then bodhisattva archetype after his mid-aged years. This article also discusses the contents of each archetype and the effects on the evolution of his advocacy of the Engagement Buddhism.