俞琰是宋末元初颇具影响的易学家和道教学者,著作甚多。其易学“集衆说之善,以朱子《本義》为宗,而邵子、程子之学義理、象数一以贯之,诚有功於《易》者也”(纳蘭成德《周易集说序》);“覃精研思,積三、四十年,實有冥心独造,发前人所未发者,固不可废也”(《四库全书总目·周易集说》)。其内丹学兼采儒道,以儒家心性之说与道家养生之术互相发明,别具一格。但其在易学史上和道教史上的地位还没有引起学术界的足够 Yu Yan is an influential essayist and Taoist scholar in the late Song and Yuan dynasties with many books. Its easy to learn “set the public to say good, to Zhu” original meaning “as the case, and Shao Zi, Cheng Zi Zhi’s theory, the image of a consistent, sincere contribution to” easy “who also (”Sikuquanshuzongyou · Zhou Yi Ji Shuo“); ”Qin fine study thinking, product three or four years, . The inner Danology and Confucianism by Confucianism, Confucianism and Taoism advocate the health of each other invention, unique style. However, its position in the history of Yi learning and Taoism has not yet caused enough academic circles