The general process of information retrieval is as follows: 1. Analyze the research topic, and make clear the subject content, research points, subject range, language range, time range, literature type, etc. 2. Select the information retrieval system and determine the retrieval path. 1. The method of selecting the information retrieval system: (1) Under the condition that the information retrieval system is complete, first use the information retrieval tool guide to guide the selection; (2) If there is no information retrieval tool guide, you can choose by browsing the information retrieval tools displayed in the information retrieval tool room of the library and information office; (3) Choose from familiar information retrieval tools; (4) Take the initiative to ask the staff; (5) Help to choose online through the network.