中国传统学术的转型是20世纪中国文化转型的核心内容，易学作为中国传统学术的重要一环，其自身的发展和流变体现了中国传统学术转型的特征。在20世纪，易学发生了巨大变化，不断呈现新面貌，开拓新领域，取得新成就，展现了鲜明的时代特征和精神风貌。根据20世纪易学发展脉络，可将其划分为五个阶段。通过阶段性的梳理发现：易学与时代联系紧密；观念的变革成为推动易学发展的重要动力；客观实证与“同情之理解”、中西本位问题及易学对当代社会的价值问题成为20世纪易学发展的三条重要线索。

The transformation of Chinese traditional academic is the core content of China cultural transformation in 20th Century. YIJING, which is an important link to Chinese traditional academic, has been presenting the characteristic of Chinese traditional academic whilst its own rheological development and transformation. In 20th Century, YIJING has been appearing great changes. It has been continually presenting new looks, opening up to new areas and gaining new achievements. YIJING has sharply shown characteristics of the times and the spirit of the theories. Under the context of the 20th Century, YIJING study can be divided into five stages. Combing through the discovery stage: YIJING study closely with the times; the concept of change is an important driving force to promote the development of YIJING study objective evidence, the "sympathetic understanding " of Chinese and Western standard and the contemporary social issues of value are three important clues to learn the development of YIJING study in the 20th Century.