As one of the most influential constructs in educational psychology, academic motivation represents individuals’ drives and energies to learn; as an emerging construct attracting increasing interest, engagement manifests individuals’ drives and energies, such as the use of self-regulation strategies. However, little existing research simultaneously considers these two groups of constructs within one framework, or takes their antecedents and outcomes into account, especially in regards to Chinese university students. The present study attempts to systematically study motivation and engagement on the basis of social-cognitive motivation theory and achievement orientation theory as a means of unifying substantive and empirical claims. To accomplish these purposes, two studies, each with two parts, have been conducted with Chinese university students as participants. In Study One, Part One explores the factor structure of several instruments – including the Motivation and Engagement Scales-University/College (MES-UC), the Goal Orientation and Learning Strategies Survey (GOALS-S), the Scale of Institution Integration (SII) and the Academic Satisfaction Questionnaire (ASQ) – in half the sample (426 cases). Cross-validation with the other half of the sample is then undertaken (423 cases). Part Two investigates a process model, which includes student multiple motivational beliefs, engagement and educational outcomes through path analysis. The results suggest that students’ work avoidance goal predicts their academic dissatisfaction directly and indirectly via maladaptive engagement; their social concern goal indirectly predicts intellectual development via adaptive engagement; their social approval goal directly influences achievement; and student engagement mediates the impacts of other motivational beliefs on their academic dissatisfaction, intellectual development and achievement. Furthermore, social concern, social approval, social status goals and work avoidance goals are significantly related to motivation and engagement. 　　In Study Two, Part One cross-validates the MES-UC instrument in a new independent sample (836 cases) of Chinese university students. Other instruments including the Motivated Strategies for Learning Questionnaire (MSLQ) and the Patterns of Adaptive Learning Survey (PALS) are also validated. Part Two investigates a process model, which includes classroom goal structure, motivational beliefs, engagement and achievement through path analysis. The results find that the classroom mastery goal structure predicts adaptive and maladaptive engagement via adaptive motivation, and the classroom performance-avoidance goal structure affects maladaptive engagement via personal performance-approach goal orientation and maladaptive motivation In summary, by considering the classroom goal structure as a contextual antecedent and a variety of motivational beliefs as individual antecedents, as well as achievement-related constructs as outcomes, the thesis finds the mediation effect of motivational beliefs between classroom goal structure and student engagement, as well as the mediation effect of engagement between motivational beliefs and achievement-related outcomes. The thesis also summarizes the main contributions, and implications, noting the limitations and pointing out some directions for future research in the field of student motivation and engagement. / published_or_final_version / Education / Doctoral / Doctor of Philosophy