Educational benefit refers to the role and benefits of talents trained by education to society. In western educational economics, educational benefit generally refers to the result of an annual reward obtained by comparing the income of people with different education levels with the cost of receiving such education. The income of educational investment is the most concerned topic of society and individuals. The purpose of educational benefit science is to study the benefits of education. All events that can have a positive or negative impact on educational benefits can be reflected here. Educational benefit is a branch of educational economics. So far, a complete discipline has not been formed. From the social point of view, the results of the study on educational benefits can reflect the amount of income gained from educational investment at all levels, understand the social and economic demand for a certain type of labor trained by education, and can be used as one of the reference bases for formulating educational plans. From a personal point of view, the knowledge and skills to make a living can be obtained through education, and these knowledge and skills can be reflected in the salary income of personal work. Therefore, the lifetime income of different educational years and categories may be different.