朱震易學的氣化宇宙觀，肯定宇宙的本源是一種實有的氣化流行之存在，並且強調變動之性，重視陰陽的變化之道。此陰陽的變化之道，亦即乾坤的變化之道，乾坤在其易學系統中，占有極為重要的地位。歷來探討宇宙觀的議題，學者普遍關注的，大都著重於陰陽運化的認識，而乾坤在當中所觸及的理解，則相對薄弱。尤其，朱震又特別重視乾坤在宇宙觀中所扮演的角色，對乾坤的論述尤甚。因此，本文希望從其易學思想中，探討乾坤所傳達的重要意義，包括從乾坤同於陰陽之性的創生系統、乾坤具無形的本源功能、乾與坤的重要區別、乾尊坤卑的必然性認識等幾個方面進行概括性的闡述。

In his Qi-hua cosmology, Zhu Zhen argues that the origin of the universe is a flowing substance-Qi, and emphasizes the change of Yin and Yang, or the change of Qian and Kun. Qian Kun is an important element in Zhu Zhen's theories of Yi. Regarding the issue of cosmology, most scholars have focused on the understanding of the flux of Yin and Yang, paying little attention to Qian Kun. Zhu-Zhen emphasizes and elaborates on the role Qian Kun plays in cosmology. The present study aims to explore the significance of Zhu's theories of Qian Kun, including the notion that Qian Kun and Yin Yang originate from the same system, the function of Qian Kun and the distinction of Qian and Kun and the concept of superior Qian and inferior Kun.