The aim of this paper is to explore the analysis of Universal Grammar (UG) approach on Second Language Acquisition (SLA). This paper is significant as the sources for teacher or researcher of the second language since this elaboration is deeply focusing on the use of UG on SLA. The method used in this academic writing is inductive method of writing. Three main analyses namely Construct Knowledge of Language, Acquiring Language and Language Use are elaborated strongly in this paper. Furthermore, this paper concludes that UG is very important on teaching and learning of the second language in Indonesia.