In this review, the causes of the Quarter Life Crisis, a prevalent phenomenon in emerging adulthood, was evaluated. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology was used for this research’s systematic review. We browsed a variety of academic studies that had been published in English language, published in PubMed, Elsevier, Taylor & Francis, and Semantic Scholars that examine quarter life crisis. The literature search generated a total of 3100 publications. After removing duplicates and screening titles, abstracts, and full-text evaluation, there were 14 articles were included in the final analysis. The results were validated and examined. There were internal and external factors impacting quarter life crisis. The most powerful internal influences were commitment to purpose, spirituality, and anxiety. Meanwhile, social support, age, and gender were the most important external influences.