At a certain stage of society development through history, the emergence and development of cities has arisen. Cities are among the most successful and most productive inventions of today. They are leaders and initiators of change and development of the whole world. They are allowing people to network, encouraging creativity and innovation of people, and improving the standard of people's lives. Cities that invest in their development using new modern technologies are called smart cities. To call a city smart city it's not enough to apply innovative technologies. In the account should take the environment in which the city is located as well as the inhabitants of the city. The development of the city needs to be in the accordance with the wishes and needs of the people and enable people to progress in the private and business area. Smart Cities use information communication technologies and solutions that contribute to the quality of life of people in cities, encourage citizen mobility, create a safe environment for life and enable energy efficiency. By utilizing network infrastructures and communication technology solutions, smart cities improve the quality of life in them, all with the advancement of the social, cultural, urban and economic development of the city. Characteristic for smart cities is the use of advanced telecommunications networks and application development that regulates, manages and controls the systems used in the city. In order for smart cities to work smoothly with all the modern technology used in smart cities, they must be interconnected and used properly and supervised by the public administration. Among the smart cities that have developed new technologies which are widely used are Singapore, Dubai, Barcelona and Bristol.