有清末年,山东聊城海源阁藏书楼,广聚南北佳椠,藏书达数十万卷,不仅数量多,且重宋元善本,享誉海内外,世称“南瞿北杨”。但海源阁几代主人不惟收藏,在搜罗之馀,勤于笔耕,故又著述甚丰。杨以增同年友梅曾亮曾曰:“(以增)名物、象数、音声、训诂亦勤恳研究。陆立夫(建瀛)尝语予曰:吾向以至堂好蓄书,今乃知其得一书必阅一书也。”以增治学成绩卓然,著有多种学术著作,且有卓见。在《礼理篇书后》一文中他系统阐述了自己对清中叶关于“礼”与“理”之争的学术观点,从而“息群儒之聚讼”(高行信《志学箴题识》);在《海源阁藏书记》中提出了有关治学的“海源”学说,影响颇钜;他在与友人的通信及一些题跋中多次表明治“经”的理论,如“读经而不由郑学,犹欲入室而不由门户也。”(《六艺堂诗礼七编叙》)“学先识字,循轨辙于汝南,教重传经,溯渊源于高密。”(《杨至堂致许印林八通书》之一)洵为不刊之论。在《志学箴》中说道:“非汉唐则典章制度莫详,故注疏为尚;非程朱则世道人心莫挽,故践履为 In the late Qing Dynasty, Shandong Liaocheng Haiyuan Pavilion Library, Guangnan North and South Jia, a collection of hundreds of thousands of volumes, not only the number of heavy and rare, well known at home and abroad, the world . However, several generations of Master Haiyuan Pavilion not only collect, in collecting the rest, diligent in writing, so again very rich. In the same year, Yang Yi-zeng grew up with Friends of the United States once said: ”(To increase) the famous, elephant, sound, training 诂 also diligent study .Li Lifu (Jian Ying) tasting language to say: A book must read a book also. “” To enhance the academic performance Zoran, there are a variety of academic works, and excellent. In “The Book of Rituals and Articles”, he systematically expounded his academic view on the dispute over “Ceremony” and “Reason” in the mid-Qing Dynasty, and thus “ The subject of ”Probation of knowledge“); in the ”Secretary of Haiyuan Pavilion“ put forward the ”sea source“ theory of scholarship, the impact is quite huge; he and his friends in a number of inscriptions and communications repeatedly stated governance Theory, such as ”read the Bible without Zheng Xue, even if not by the portal into the room. “ (”Six Arts Hall of Fame VII Syria“) ”learn first literacy, Rutan in Runan, teach re-transmission, Originated from high density. “(” Yang Zhi Tang to Xu Yulin “one of the eight books) 洵 for the magazine’s argument. In ”Zhi Xue Zhen“ said: ”non-Han and Tang Dynasties is not detailed rules and systems, so note sparse is still;