Cosmology is a philosophical topic that Kant has always concerned.In the 1750s,it appears as cosmogony,and Kant then focuses on the gen-eration,evolution and aging of the universe.After the 1770s,Kant first studied it systematically under the name of a branch of metaphysics.The reason why Kant dealt with this topic is undoubtedly closely due to the profound influence of German rationalist thinker such as Wolf and Baumgarten on him.In particular,their division and analysis of metaphysics and its branches directly determine Kant's cognition of this problem,which have left obvious traces of thought in the works of Kant's pre-critical and critical philosophy.Obviously,an uncovering and recognition of Kant's rational cosmology is of great value to our comprehensive understanding of his philosophy.