This study presents a structural model that integrates vocabulary knowledge and motivation with six latent variables: the initial appraisal of vocabulary learning experience, self-regulating capacity of vocabulary learning, strategic vocabulary learning involvement, mastery of vocabulary learning tactics, vocabulary knowledge, and postappraisal of the effectiveness of vocabulary learning tactics. The model suggests that motivated vocabulary learning follows a developmental mode and functions as a cyclic process. The model supports the importance of motivation in the vocabulary learning process and the division of strategic behavior into two components: one frequency-based and metacognitive in nature and the other focusing on the mastery of individual strategies (i.e., how well they are used).