Information collection is a process of searching, summarizing, sorting out and finally forming the required effective information through various channels. Various channels include: first, first-hand information, that is, direct information, obtained through field investigation, interviews, personal experience, personal witness and so on. The second is information obtained indirectly through some medium. For example, all kinds of information obtained through books, newspapers, television and computers. At present, due to the limitations of various conditions and the development and convenience of network technology, the main way for us to collect information comes from the network, and the main tool is the computer.