In this article, I intend to compare Augustine's and Husserl's theories of time. My discussions relate to three main issues as follows: (1) the motivation and the starting point for their questions about time; (2) their explanations of the beingness (Seinheit) of time-phenomenon (Zeitphänomen) as well as those of the constitution of time; (3) their analyses of the fundamental basis of our time-understanding (Zeitverständnis) and the origin of time.