The research topic of the author’s PhD dissertation is “The Impact of Motivation Cultivation on English Autonomous Learning among University Students in Hunan, China—A Mediating Role of Learning Strategy.” Within this topic, three key variables are identified: the dependent variable (DV), the independent variable (IV), and the mediating variable (MV). Specifically, the DV refers to English autonomous learning, the IV refers to motivation, and the MV refers to learning strategy. The research establishes that the MV (learning strategy) is an integral component of information processing theory (IPT). Consequently, the dissertation incorporates integrative and instrumental motivation theories alongside IPT as its foundational theoretical framework. This paper aims to explore the theoretical framework of the PhD dissertation in detail, focusing on the interplay of these three theories.