Due to the political chaos in the process of Taiwan's political democratization over the past 20 years, which included several constitutional amendments, the public has come to doubt about the essence of Constitution of the Republic of China (Taiwan). Under these circumstances, the subject of Constitution, in particular as one of the general education courses, has been facing severe challenges. For example, considerable students who take Constitution as a general course, have low motivation and little interest that greatly affect learning result. However, a democratic constitution is always gifted with the function of protecting human rights. The importance of the constitution is self-evident in modern democratic countries. On the other hand, the constitution knowledge is also a requirement for the students who plan to be government employees. Professor J. M. Keller of the Florida State University has proposed "The ARCS Model" for stimulating the motivation of learning. Therefore, the author of this essay applied Keller's "The ARCS Model" to institute a descriptive study on teaching strategies which are expected to be feasible for stimulating students' interests in learning the subject of Constitution. Herein, based on the experience of teaching the course of Constitution for more than 20 years, the author found that as an elected course not assigned a favorite time for students to take classes, the course still attracted many students. It has showed the association exists between "the ARCS Model," students' interests and their motivation of learning.