Neuroscientists in recent years are describing a lot of the complex structure of the brain and also the mechanisms of learning and memory in the brain by using the recently developed technology. Therefore, the researcher attempts to make a leap into an approach for a better foreign language learning by investigating the concept of brain plasticity first and followed by considering the relationship between language acquisition and learning period as well as foreign language proficiency in this paper. Also, the researcher would like to contemplate about how to engrave plasticity on the academic world and how to make best use of it.