Science and engineering disciplines are the most extensive disciplines in the classification of university majors. Based on natural science, this paper focuses on all aspects and application directions of natural science and production application. Science and engineering majors are all oriented to science candidates in the college entrance examination. The two main directions are science and engineering. 1. Science and engineering complement each other, but the difference lies in their different emphases. Many people are confused about the difference between science and engineering. In fact, the simplest explanation is: Neo-Confucianism pays attention to theoretical research and scientific training, which is conducive to further study; Engineering focuses on technical application. In fact, almost all science and engineering majors are corresponding: for example, science has materials science, and engineering has materials science. Because of this, many people confuse them. Although there are many intersections between theory and work, there are still great differences. Materials science focuses on cultivating students to master basic theories, have relevant basic knowledge and skills, and cultivate senior materials professionals who can engage in research, teaching, scientific and technological development and related management in materials science and engineering and related fields. The materials in engineering mainly cultivate senior engineering and technical personnel who can engage in production, design, scientific research and management in professional fields. 2. Introduction of some majors and disciplines in science: biological science: majors include biological science and biotechnology. This major trains students to learn the basic theories and knowledge of biological science and technology, and students will be trained in scientific thinking and scientific experiments in applied basic research and technology development. Besides, I have good scientific literacy and basic abilities in teaching, research, development and management. Employment target and prospect analysis: you can engage in scientific research or teaching in scientific research institutions or universities, and you can engage in applied research, technology development, production management and administrative management related to biotechnology in enterprises, institutions and administrative departments in industries such as industry, medicine, food, agriculture, forestry, animal husbandry and fishery, environmental protection and gardening. As a frontier discipline developed in recent years, further education is good for research, but the competition for further education is relatively large. Recommended institutions for biological sciences: Peking University Marine Science and China University of Science and Technology: majors include marine science and marine technology. This major trains students to have solid basic theories and knowledge of mathematics, physics and marine science and technology, receive basic training in marine science and technology research, master basic investigation methods and experimental skills of marine science, and have the basic ability to engage in marine investigation and marine scientific research. Employment goals and prospects: Students have the basic knowledge of marine science and the ability to develop and research marine high-tech, and have greater opportunities to continue to study marine high-tech, marine resources development, marine engineering and other majors. Recommended institutions for marine science: China Ocean University Psychology: Majoring in psychology and applied psychology. Students in this major mainly study the basic theories and knowledge of psychology and train through psychological scientific thinking and scientific experiments. They have good scientific literacy and the basic ability to conduct psychological experiments and psychological measurements. Employment prospects and objectives: Have the basic theories, knowledge and skills of psychology, and be able to engage in psychological research, teaching and management in scientific research departments, colleges, enterprises and institutions. There are great opportunities for further study, which is more conducive to personal development. Going abroad will be more acceptable to the complete system of the west. Recommended institutions: South China Normal University, Peking University, other science majors: Mathematics, Physics, Chemistry, Biology, Astronomy, Geology, Geography, Geophysics, Atmospheric Science, Mechanics, Electronic Information, Environmental Science, Statistics 3. Introduction of some engineering majors: Civil engineering has been a popular major for many years, with broad employment prospects, including architecture, urban planning, statistics and so on. Mainly cultivate knowledge and skills related to architecture, urban planning and civil engineering. Employment prospects and objectives: I can engage in technical or management work in the design, research, construction, education, management, investment and development departments of housing construction, underground construction, tunnels, roads, bridges and mines. Recommended institutions for civil engineering: Tsinghua University University of North Technology, Xi University of Architecture and Technology, Shandong Institute of Civil Engineering and Architecture: majors include ocean and ship engineering, mainly studying the basic theory and application knowledge of physics, mathematics, mechanics, ship and ocean engineering principles; Master the design methods of ships and marine structures; Have the ability of preliminary hull drawing and scientific research by computer; Familiar with the construction laws and regulations of ships and marine structures and the specifications of important classification societies at home and abroad; Understand the theoretical frontier of shipbuilding and marine development, the application prospect and development trend of new ships and marine structures; Employment prospects and objectives: senior engineering talents in ship and ocean engineering who can engage in the design, research, manufacture, inspection, use and management of ships and marine structures. Recommended institutions for marine engineering: China Ocean University, Dalian Maritime University, and other engineering majors: geology and minerals, materials, machinery, instrumentation, energy and power, electrical information, civil engineering, water conservancy, surveying and mapping, environment and safety. Chemistry and pharmacy, transportation, marine engineering, light industry, textile and food, weapons, aerospace, agricultural engineering, forestry engineering, public security technology, engineering mechanics, biological engineering.