The number of nursing universities and colleges in Japan became 100 in 2002, which shows rapid academic development of nursing. However, unlike medicine, nursing has its own difficulty in developing through researches. The purpose of this paper is to clarify the characteristics of basic ideas of nursing, making a comparison between nursing history and the development of modern medicine. Especially, to establish nursing as an academic field, the knowledge-creating problem in nursing is discussed by citing the theory of organizational knowledge-creating that transforms practical/clinical knowledge, that is tacit knowledge, into theoretical knowledge, as well as the personal opinion on how to accumulate clinical knowledge and systematize them. Furthermore, the role of library is discussed in terms of accumulating and systematizing the results of nursing researches.