《公羊傳》以最能闡發《春秋》的「微言大義」而聞名，也是「春秋三傳」中最早立於學官者。春秋公羊學在東漢之後，日益衰敗，幾成絕學，直至晚清才再度興起，首要功臣當推劉逢祿。劉逢綠在古文經學鼎盛之際闡發《春秋公羊》的「微言大義」，使沉寂近二千年的今文經學得以重振復興。劉逢祿不僅是清代公羊今文經學的開創者，也是公羊思想的奠基者，更是春秋公羊學的復興者。其公羊思想在春秋公羊學的發展史上具有繼往開來的歷史意義。

The Gueng-iang Juan was famous for interpreting ”the sublime word with deep meaning” of the Chuen-chiou exactly, and was also given the official position of the academy fistly among the Three Chuen-chiou Juan by government .After the latter Han dynasty, the theory of the Chuen-chiou Gueng-iang decayed gradually, and almost vanished, until it revived in the late Ching dynasty. Liou Feng-Lu had made an important contribution to the revival of the theory. Liou Feng-Lu interpreted the ”sublime word with deep meaning” of the Chuen-chiou Gueng-iang during the classics by writing with old word were prevailing, and made the classics by writing with contemporary word revive after two thousand years' silence. Liou Feng-Lu was not only the founder of the classics by writing with contemporary word in Ching dynasty, but also the man who made the thought of the Gueng-iang revive. His thought of the Chuen-chiou Gueng-iang had the historic meaning of inheriting the former and establishing the latter in history of the development on the theory of the Chuen-chiou Gueng-iang.