This paper summ a rized the main ideas of economy growth coming from hum an capital and endogenous g row th theories. A m odel about valuing the contribution rate of economy growth was built, based on three kinds o f datum. The resu lt is that hum an capital has an i m po rtant rise to i m prove econom y growth. The diffe rence be t w een undeve loped economy and developed economy is caused by the lack ofrise of human capital on economy growth. Economy promo tion relies on the quantity and the output efficiency of hum an capita l investmen.