We know that the development of science and technology is continuous and inherited, and building a car behind closed doors will only repeat the labor of others or take detours. For example, it took a domestic research institute about ten years to successfully develop a new technology of "replacing silver with magnesium" and applied for a patent with confidence. However, an American company had obtained a patent for this technology as early as the end of the 1920s, and the specification of the patent was kept in the local Institute of Science and Technology Information [7]. Repetition is the most taboo in scientific research, because it is unnecessary waste. In research work, every link of any topic, from topic selection, experiment to results, is inseparable from information. At the beginning of selecting a topic, researchers must conduct information retrieval to find out what others have done, what they are doing, who is doing it and how it is progressing. In this way, users can re-create on the basis of other people's research, avoid repeated research, and take fewer or no detours.

(b) saving researchers' time.

The rapid development of science and technology has accelerated the growth of information and increased the burden of information collection for information users. Many researchers also realize that they should look for information after undertaking a certain project, but they think that information is information retrieval in the library all day, which wastes a lot of time, but rarely finds valuable information, and the recall rate is very low. Information retrieval is the foundation and necessary link of research work. Successful information retrieval will undoubtedly save researchers a lot of time and enable them to spend more time and energy on scientific research.

(C) is a shortcut to acquire new knowledge

In today's reform and opening up, the knowledge-based talents trained by traditional education can no longer meet the needs of market economy under the reform environment. The new situation requires the cultivation of high-quality innovative talents. Talents with these abilities first need to have the ability of self-study and independent research. College students have mastered certain basic knowledge and professional knowledge during their school days. However, "giving it to fish" can only be enjoyed for a while. If you master the method of information retrieval, you can learn by yourself, find a shortcut to absorb and use a lot of new knowledge, and guide everyone to a broader field of knowledge and explore the unknown world. It is said that "giving people fish" can be used for life.