A search engine refers to a system that collects information from the Internet according to certain strategies and uses a specific computer program, organizes and processes the information, provides retrieval services for users, and displays the retrieved relevant information to users. A search engine is a retrieval technology that works on the Internet. It refers to improving the speed of people’s acquisition and collection of information and providing people with a better environment for using the Internet. In terms of function and principle, search engines are roughly divided into four categories: full-text search engines, meta-search engines, vertical search engines and directory search engines. With the development of search engines today, the infrastructure and algorithms have basically formed and matured in technology. A search engine has developed into a system that collects information from the Internet according to certain strategies and uses a specific computer program, organizes and processes the information, provides retrieval services for users, and displays relevant information retrieved by users to users.