Abstract: Historically, there existed many definitions of knowledge and various perspectives on knowledge, but most of them regarded knowledge as correct, tested and systematically processed by experts and scholars. Since the birth of the Internet, human experience has been recorded in details, stored in digital media, and spread rapidly through the Internet. A new type of knowledge has emerged or got recognized. This kind of knowledge is called soft knowledge, which is still in its forming process and has not been processed and sorted out systematically, while the traditional knowledge is called hard knowledge, which has been processed and sorted out systematically. The index to distinguish between soft and hard knowledge is the stability of knowledge, including the stability of structure, content and value. The concept of knowledge marked by the division of hard and soft knowledge is called new perspective on knowledge. New concept of knowledge has brought about a series of changes, including new learning concepts, new teaching concepts, and new theories and models of teaching and learning, which will have a profound impact on educational reform and educational informatization in the new era.