元政府设官授职,延聘回人从事天文工作,在学术界虽人所共知,可长期以来很少全面、深入地探讨。笔者拟从回回天算家的东来与元初回回天文机构的创设、元回回天算家的天文工作、元代中原与西域天算家的交流三个方面全方位地讨论这方面的问题,请指正。 Yuan government officials set up offices, hiring back to engage in astronomy work, although well-known in academia, may have long been rarely comprehensive and in-depth discussion. The author intends to discuss this issue in all aspects from three aspects, namely, the East China Returnees and the Yuan Dynasty back to the establishment of astronomical institutions, the return of celestial work to Yuan Dynasty, the exchanges between the Central Plains and the Western Regions, Please correct me.