On the development of information science and the new situation of social development, we have entered the information age, and it is no longer strange for us to talk about information science. Since the advent of computers in the mid-1940s, the first information revolution in the world has had an unprecedented impact on human society, and the information industry came into being, and mankind stepped into the information society. The second information revolution triggered by the "information superhighway" characterized by networking and multimedia will make mankind enter the information age. It is an inevitable product of the information age and a new interdisciplinary subject with information as the main research object. The research contents of information science include: clarifying the concept and essence of information (philosophical information theory); Discuss the measurement and transformation of information (basic information theory); Research on information extraction method (recognition information theory); Clarify the law of information transmission (communication theory); Proven information processing mechanism (intelligent theory); Explore the theory of information regeneration (decision theory); Explain the regulation principle of information (cybernetics); Improve the organization theory of information (system theory). Expanding the function of human information organs and improving human ability to receive and process information are essentially expanding and enhancing people's ability to understand and transform the world. This is both the starting point of information science and its final destination. Here, I want to start with information. In a sense, information refers to news that is useful to us. It strictly requires certain timeliness and is called instant messaging. With the development of information, information technology (short for international technology) came into being. Information technology is the general name of application technologies such as information generation, transmission, reception, conversion, identification and control, and it is a technology to expand human information processing functions under the guidance of the basic principles and methods of information science. Information technology includes communication technology, computer technology, multimedia technology, automatic control technology, video technology, remote sensing technology and so on. Its main pillars are communication technology, computer technology and control technology, namely "3C" technology. Communication technology is an important part of modern information technology. Digitalization, broadband, high speed and intelligence of communication technology are the development trends of modern communication technology. Computer technology is another important part of information technology. Since the birth of computer, it has been processing a lot of information for people, and with the continuous development of computer technology, its ability to process information is also constantly strengthening. Now computers have penetrated into all aspects of people's social life. Computers will develop into parallel processing. Modern information technology cannot be separated from computer technology for a time. Multimedia technology appeared only in 1980s. It comprehensively processes information such as words, data, graphics and sounds through computers, so that people can obtain more complete and intuitive comprehensive information. Multimedia technology will play a very important role in the future. A large part of information technology processing is images and characters, so video technology is also a research hotspot of information technology. The development of information science and technology not only promotes the development of information industry, but also greatly improves production efficiency. Facts have proved that the wide application of information science and technology has become a great driving force for economic development. Therefore, the competition of information technology in various countries is also very fierce, and they are all vying for the commanding heights of information technology. Information science, life science and material science together constitute the three frontier sciences of the contemporary era, and information technology is the core of the new technological revolution in the contemporary world. Information science and technology is the forerunner of modern science and technology, the theory, method and technology of efficient, effective and high-speed social activities, and an important symbol of management modernization. With the development of society, information plays an increasingly important role in our school. While promoting social progress, our dependence on science and information is further deepened, the requirements for technology are getting higher and higher, and the progress of technology is more informationized. The higher the degree of informatization, the more it can promote social progress. The two complement each other. It can be seen that information technology has made great contributions to us. Under the current historical conditions, information science is developing and improving rapidly, and people have not yet reached a unified understanding of the scope of its research content. At present, the main research topics focus on the following six aspects: 1, information source theory and information acquisition, research on natural information sources and social information sources, and methods and technologies for extracting information from information sources; 2. Information transmission, storage, retrieval, conversion and processing; 3. Measurement, analysis, processing and display of signals; 4. Pattern information processing, which studies the processing, classification and recognition of characters, images, sounds and other information, and develops machine vision systems and voice recognition devices; 5. Knowledge information processing, which studies the representation, acquisition and utilization of knowledge, and establishes a knowledge information processing system with reasoning and automatic problem solving ability, that is, an expert system; 6, decision and control, on the basis of information collection, analysis, processing, identification and understanding to make a judgment, decision or control, so as to establish a variety of control systems, management information systems and decision support systems. Information process exists in biology, society, industry, agriculture, national defense, scientific experiments, daily life and human thinking, so information science will have a great impact on engineering technology, social economy and human life. Information technology combined with science and technology is not only a means and tool system to expand human information organs, but also has rich ethical and political significance. Information technology embodies the right and system of human beings to transform and control nature. The influence of information technology on the development of human society cannot be simply summarized. It has brought great influence to the development of society from two aspects: first, the positive influence of information technology has expanded the functions of human organs. Therefore, the positive significance of information technology is beyond doubt. The positive influence of information technology has penetrated into every field of social development and every corner of personal development. Mainly reflected in the following aspects. (1) Information technology has increased the openness and transparency of politics, mainly in the following aspects: 1. Informatization and networking make it easier for the broad masses of people to use information technology, obtain a wide range of information through the Internet, and actively participate in the political life of the country. The government set up a beach on the Internet and pushed itself to the Internet. Government departments at all levels continue to carry out e-government projects in depth. The openness of government information has increased the transparency of administration and strengthened the interaction between the government and the people; The sharing of resources among government departments enhances the coordination ability of various departments, thus improving work efficiency; Various information services provided by the government through its e-government platform, including various application services for individuals and tax services for enterprises, have provided great convenience for the broad masses of the people. (2) Information technology has promoted the development of the world economy, mainly in the following aspects: 1, which shows that the emergence and development of information technology has a far-reaching impact on traditional industries, and 2, it has introduced a new industry-Internet industry. The relationship between "Internet economy" (also known as network economy) and information technology is self-evident. 3. The Internet-based e-commerce model has changed the traditional business model, so that the marketing, sales and after-sales service of enterprise products can be carried out through the network, and enterprises can also realize various interactions with upstream suppliers, parts manufacturers and distributors through e-commerce. There can also be more interaction between enterprises and consumers and between enterprises and the government through the Internet. E-commerce has a great influence on enterprise research and development, production, marketing, sales, management, finance and other aspects. 4. In order to meet the requirements of Internet development, traditional industries also provide various services on the Internet. (3) The development of information technology has created a state of multicultural coexistence, mainly in the following aspects: 1. Information technology has made the cultural industry develop rapidly. 2. As an important part of information technology, the development of Internet technology makes the network media begin to form and gradually become the "fourth media". 3. The Internet has created a new cultural model-network culture. (D) Information technology has improved people's lives, mainly in the following aspects: 1. From a macro point of view, information technology has provided many favorable factors for the development of the whole society. As a tiny member of society, every ordinary individual is enjoying various conveniences brought by information technology. 2. Information technology makes distance education possible, and teaching in different places has gradually become popular. 3. Virtual reality technology enables people to enjoy the colorful world through the Internet. (5) Information technology has pushed information management to a new stage, mainly in the following aspects: 1. As a resource, information can't naturally play its various functions, but needs to be collected, processed, stored and disseminated through various technologies. 2. Information technology, as a collection of technologies to expand human information functions, plays an important role in information management and is the technical basis of information management. With the development of modern information technology, the means of information management have undergone a qualitative change. Second, the negative impact of information technology Everything has its two sides. While information technology has brought various benefits to mankind, it has also caused a series of problems. Mainly reflected in the following aspects. (1) Infringement of intellectual property rights 1. Information technology has brought a qualitative leap to human information dissemination. In particular, the emergence of the Internet has brought great convenience to the publication, dissemination and use of works. However, the freedom and enjoyment of the network also brings great challenges to the protection of intellectual property rights, especially copyright. 2. Infringement of intellectual property rights, especially copyright, through online media is very serious. 3. The development and maturity of the Internet has also brought other intellectual property issues. In a word, the intellectual property problems caused by information technology have reached a very serious level, and the intellectual property laws and regulations of various countries have been challenged unprecedentedly. (2) The proliferation of false information 1. The Internet provides people with unprecedented free communication space, which makes people's right to speak and know get full attention. But it is precisely because of the freedom and openness of the Internet that it has become an important tool for manufacturing and spreading falsehood. 2. At present, the social credibility of network information is low. The reason is that many links in network information processing are out of control. The most important of these links is that the information source is complex and difficult to manage. 3. The proliferation of false news on the Internet, especially the innuendo of entertainment news, has become a chronic disease. In a sense, the irresponsible treatment of publishing fake news by many online media is also an important reason for the proliferation of false information on the Internet. With the rapid development of information technology and the continuous expansion of various circulation channels, the total amount of knowledge and information in human society has exploded. Among them, thousands of information are mixed with a lot of harmful and useless information, such as disturbing, deceptive, misleading and even destructive falsehood, which people call information "garbage" and all kinds of "information". Internet is a fertile ground for freedom. Anyone can easily publish and transmit information through the Internet. Without the necessary screening of information content by gatekeepers, some organizations and individuals take the opportunity to do whatever they want, which makes the junk information and even yellow information on online media increasingly rampant. 3. Information technology produces a lot of redundant information, which makes it difficult to select and identify information, and makes it difficult for people to find the useful information they need, although they are in the "ocean of information". The development of network technology provides conditions for the generation of a large number of spam. (4) Information security issues are prominent Today, computer systems are constantly being invaded by many security issues. A large number of computer software and systems are full of loopholes, and information security problems are becoming increasingly prominent, coupled with the rampant updating and endless network viruses, as well as skilled and harmful hackers. Information technology, computer technology and network technology represented by 1 are still in the initial stage of development, and many viewpoints and ideas are still immature. 2. Viruses are another threat to information security. People hate computer viruses, but computer viruses are quite common. There are still many problems brought by information technology, such as computer fraud, computer theft, network slander and network terrorism. 4. The development of information technology, especially the Internet, has caused many problems, such as cultural invasion, digital divide, information hegemonism and so on, and also caused people's thinking. However, despite the negative impact of information technology, its positive value is undeniable. Only when information technology is used in appropriate occasions can it play its greatest role. How to develop and utilize information technology legally depends on the joint efforts of governments, scientists and people all over the world. The development of society is inseparable from the guidance of information science and technology. As long as we give full play to the advantages of information science and try to avoid unnecessary shocks, we can promote social progress to a greater extent! !