Educational economics not only promotes educational reform and development, but also injects strong impetus into economic growth. The government has continuously increased investment in education, especially in the field of basic education, which has significantly improved the overall education level. However, the uneven distribution of educational resources and the tendency of exam-oriented education still need to be solved. In contrast, Japan has cultivated a large number of high-quality talents with its refined education concept and efficient education system, which has had a far-reaching impact on economic development. Through comparative analysis, this paper points out the key role of educational economics in promoting educational equity, improving educational quality and promoting economic transformation and upgrading. In the future, educational economics needs to continue to deepen its research, optimize the allocation of educational resources, and promote the closer combination of education and economy to meet the challenges and opportunities in the era of globalization.