This paper explores how intergenerational inequality transmits through education choice, us- ing administrative income, wealth, and college enrollment data in Taiwan from 2008 to 2018. I link family background with children’s labor market outcome with the long panel after grad- uating from colleges. The feature provides the opportunity to analyze the influence of family background on educational choices and future income. The descriptive results show the inter- generational inequality in college systems, fields of study, and school tiers, where children from affluent families tend to enter more prospective college systems, majors, and schools. Also, educational segregation is shown to have an impact on future income after students graduated. I then use an intergenerational elasticity (IGE) model to explore the proportion of transmission explained by educational factors. While tier of schools explains 40-60% of IGE, college major choice solely explains little transmission. This paper contributes to education economics by including college major choice in the discussion of intergenerational mobility.