Abstract: Bilingual cosmology courses for undergraduates majoring in astronomy and physics, for graduates, and for undergraduates in non-astronomy majors have been taught．Teaching reform is discussed, as well as radiation application practice related to these courses, such as MOOC course construction, undergraduate scientific research training and popular science translation．Such practices of comprehensive and systematic teaching of “cosmology” at different levels at Beijing Normal University are unique in Chinese astronomical research institutes and universities．