The paper focuses on the technological activities of the mankind in modern era with the characteristic of modern rationality. Meanwhile, the unfolding bound that modern sciences prescribe for themselves is discussed in detail. Although modern scientists have been improving the traditional “paradigm of research” continuously, it is still believed that they failed to reconstruct it thoroughly. Along with the objects of sciences being far more away from the ‘natural measure’ of the man, the difficulties of intuition will have more influence on the activities of understanding of human being. It seems clear that the rational research might come to its end. Nevertheless, this end shouldn’t be the place that rationality would end itself; on contrarily, it is the location that rationality clarifies itself. It is the main task of the enlightenment of our new era to reflect the modern rationality and its bound. The paper focuses on the technological activities of the mankind in modern era with the characteristic of modern rationality. Meanwhile, the unfolding bound that modern sciences prescribe for themselves is discussed in detail. Although modern scientists have been improving the traditional “paradigm of research” continuously. , it is still believed that they failed to reconstruct it thoroughly. Along with the objects of sciences being far more away from the ’natural measure’ of the man, the difficulties of intuition will have more influence on the activities of understanding of human being. It seems clear that the rational research might come to its end. Nevertheless, this end should not be the place that rationality would end itself; on contrarily, it is the location that rationality clarifies itself. It is the main task of the enlightenment of our new era to reflect the modern rationality and its bound.