This is because mathematics is a mathematical theory discovered by summarizing the laws of natural change from human understanding and practice of nature, that is, mathematical theory is closely related to natural practice, and mathematical theory is a portrayal of natural laws. For example, infinity and infinitesimal, positive numbers and negative numbers in mathematics. , vividly describe the infinity of the universe, let people know the macro world and micro world, what's more, mathematical theory has been applied to the whole social field, and all fields of business, industry, science and technology and human life are supported by mathematical theory, and its philosophical, scientific and artistic attributes are obvious.