This is discussed from the importance of mathematics. The big family of science includes many members: mathematics, physics, chemistry, biology, astronomy, geology, meteorology, architecture, geoscience, medicine, psychology, informatics, archaeology, economics, ethics, aesthetics, literature and so on. Mathematics is called the king of science because of its important position. Mathematics runs through all scientific theories, such as Newton's book Classical Mechanics: Mathematical Principles of Natural Philosophy, which shows the important role of mathematics. Of course, Newton, as one of the most famous mathematicians in the history of the world, has a first-class mathematical level, and this book runs through the calculus he invented. Throughout the Nobel Prize in Economics, awards have been given since 1969, and so far * * * awards have been given 4 times1time, with 64 winners. Except Hayek won the prize in 1974, almost all the prize-winning achievements used mathematical tools; More than half of the winners are economists with profound mathematical skills, and a few winners are famous mathematicians themselves. Any scientific theory is rough without applying mathematics, so people who don't know mathematics can't think deeply in science. In the history of science, mathematics has even become the dominant theory of science. This phenomenon is by no means accidental, because from a historical point of view, mathematics was originally developed in natural philosophy, and it also takes concrete things as the research object. Only later development showed its essential characteristics more and more and became an abstract science. Mathematics is considered to be the most abstract, in fact, it is its abstraction that considers the foundation. The more specific, the more factors involved in the research object. Why geometry is the basis of science is precisely because everything occupies space and algebra is the basis, because all concepts must be quantified in order to study accurately. Abstraction has two meanings, one is a description of something, and the other is difficult to understand and imagine. Of course, many times these two meanings are both, because the incomplete description is not specific and it is hard to imagine. However, the abstract theory is practical precisely because we always like to describe and deal with specific things part by part. Therefore, abstraction is often basic.