IT production industry includes computer hardware industry, communication equipment industry, software, computer and communication service industry. About the use of IT, almost all industries are involved, among which the service industry uses IT in a large proportion. IT can be seen that the IT industry not only refers to the communication industry, but also includes the software and hardware industry, not only the manufacturing industry, but also related service industries, so the communication manufacturing industry is only a part of the IT industry, not the whole IT industry.