The implementation of Taiwan's nationwide constructivist-approach elementary mathematics curriculum has been ongoing for 5 years. From the perspective of systems thinking, Taiwan elementary educational system's mindset as a whole is troubled, and is unable to coordinate with the surrounding community in order to better educational standards. The purpose of this paper is to analyze the implementation process of Taiwan's constructivist-approach elementary mathematics curriculum in terms of Reigeluth's guidelines for the system design process. The paper begins with a brief introduction on the new trend in Taiwan's elementary constructivist mathematics curriculum. It then discusses the difficulties associated with implementation, and the problems caused by those persons in the education community who have a distorted perspective on the reform. Finally, it examines these problems utilizing Reigeluth's guidelines for the system design process for more comprehensive and systemic understanding of the situations. (Contains 14 references.) (AEF)