The opportunity cost of going to college refers to the output value of another product that university educational resources give up when they are used to provide educational services and train students. This is a concept corresponding to the actual education cost. The opportunity cost of going to college can be divided into public or school opportunity cost and individual opportunity cost. The former refers to the loss of educational resources caused by investment in education, including the rent of resource assets such as houses, buildings and land and the capital gains (interest and investment gains) of non-capital investments; The latter refers to the income that individuals give up because of going to school, the funds that individuals invest in receiving education and other losses.