Smart cities are a contemporary topic in the field of urban sociology. Due to overcrowding in cities, residents face many challenges. Therefore, the development of the city is important as it can improve the quality of life for citizens. Smart city is a concept that should improve the management of a modern city, which is a complex system. The theoretical background of the work begins with modern changes in the city, then the connection is shown technologies and the city, a smart city, using the example of Zagreb and the economic, ecological and social dimension. The development of smart cities uses innovative solutions that will improve the quality of life for citizens. The main goal of this research is to discover if there is space for progress within Zagreb’s city and what these areas may be. Three specific objectives have been formulated concerning the economic, environmental and social dimensions. Qualitative methodology was collected using interviews and analysis of the chosen documents. The interviews were individual and structured, conducted online by e-mail during January 2022 using a sample of five selected participants. Experts from different fields were interviewed. Finally, the conclusions of the research are presented. This area is also interesting for further sociological research in order to use all the potentials of a smart city in order to improve the quality of life for the citizens of Zagreb.