Urbanization and informatization are two major themes facing the development of cities in the world today. Historical development shows that these two processes influence and promote each other. In the process of urbanization, the popularity of automobiles promoted the western countries (such as the United States) to enter the process of suburbanization in the 1950s, but it brought a lot of problems such as idle land, low utilization rate and excessive urban sprawl. In order to solve these problems, new urbanism and regionalism came into being to limit the excessive expansion of the city and revive the city center.

Information and its network have penetrated into all fields of urban transportation, residence, work and entertainment, and the traditional urban functions are undergoing profound changes.

First, it affects the traffic function of the city. Because of the separation of work and residence, commuting in the city is inevitable. Technological determinists believe that with the prevalence of telecommuting, tangible physical transportation in cities will be replaced by intangible electronic transportation, so the transportation function of cities will be greatly reduced [4- 18]. But people's face-to-face communication will still exist, and transportation is still needed. Many scholars believe that network technology will increase urban traffic [7,8, 19-2 1]. To sum up, the main reasons are as follows: 1) People live far from work, which can reduce commuting time, but can't reduce commuting distance; 2) People may have more time to commute to other activities; 3) Staggered commuting time can also increase people's potential commuting volume; 4) Teleworkers prefer private cars to public transportation; 5) Because of the use of the vehicle-mounted workbench, people can use their time on the road to work remotely, resulting in traffic congestion. In recent years, western countries rely too much on private cars, the underdeveloped public transport leads to an increase in commuting time and mileage, and the total commuting volume in cities remains high, which provides strong evidence for the above theory. However, according to the research of Chinese scholars, the traffic flow in Shanghai is negatively correlated with information technology (telephone), and the development of information technology can make the total traffic flow of the city decline [22].

The second is to affect the residential function of the city. With the change of work and lifestyle in the future, the functions of the community will be diversified, the shape of the community will change, and the boundaries of the community will become more blurred. With the integration of virtual community and material community, many new communities have emerged, such as remote villages. Bule Line Televillage in Los Angeles is a two-square-mile electronic village, which used to be a public transportation corridor. Planners link land use, transportation and electronic communication to create a livable community, reduce motor vehicle traffic, increase community activities and improve community density [20]. Information technology has also brought new opportunities to some declining communities. For example, the application of information technology makes many high-rise buildings more attractive [23]. The residence in the information age is not only a rest place, but also an activity center. Residential apartments need to provide special facilities such as reception room and meeting room that cannot be provided by home offices. The attraction of housing in the information age is no longer the size of the bedroom, but the information infrastructure (network speed). Living space will be more concentrated in rural areas with beautiful natural environment and pleasant climate, attracting white-collar workers who can work remotely freely to live here.

Third, it affects the working function of the city. Castel divided the workers in the information age into network organizer (Networker), web workers and gateway worker [4]. In the information age, there will be a trend of more differentiation in working methods. People can not only work in the traditional office, but also work at home, or use the car platform when traveling. The latter two are called telecommuting. Gillespie divides telecommuting into five categories: electronic homework, electronic telecommuting, nomadic or mobile workers, telecommuting and team telecommuting. There are more men than women engaged in telecommuting, and most of them are management, scientific research, sales and freelancers with high social status and high salary. Of course, there are also many regular low-paid occupations, such as data processing and secretarial work. But from the employer's point of view, telecommuting is not conducive to effective management; From the perspective of employees, telecommuting is also not conducive to communication between employees, so that the traditional workplace is still needed [20]. Even for professional managers and creative workers, telecommuting for more than two days a week is considered inefficient.