Abstract: Through a recall of the development process of science and an analysis of the situation of contemporary science, this paper presents a point that since 1940s science has entered a new age that, compared with the previous ages, possessessome distinctive features-more obvious in the unity of subdivision and comprehension, more penetrating in the embeddingof liberal subjects and scientific subjects, more extruding in its utility, and more difficult in its innovation; in addition, human is more restrained by science.