This article summerises my case study which investigates two important psychologicalfactors in foreign language learning, including motivation and anxiety, and their influences on learners.Regarding the participant, the study involves one Vietnamese learner who has a great deal of experiencein her English learning journey both in Vietnam and Australia. For the research aims to be achieved,questionnaires and semi-structured interviews were carried out to collect data related to the participant’sfeelings, thoughts, and experiences. The study’s result indicates that strong integrative motivation aswell as benefcial and inhibitory anxiety associates with the learner’s English learning and performance.Following are some implications to promote learners’ motivational aspects and mitigate anxiety-relatedissues, which were proposed by the researcher