Intelligent technologies such as Business Intelligence systems, big data, artificial intelligence including machine learning and cognitive technologies play crucial role in the process of a smart city management. The aim of the paper is to indicate the role of intelligent solutions in the management of a contemporary city, particularly focusing on the support of decision making process. The research methodology is based on a qualitative approach where six case studies were conducted in the selected big cities in Poland in 2021 year. The respondents belonged to the group of mainly managers of IT departments in the cities. The case study analyses showed that implemented intelligent solutions in the process of a smart city management positively and significantly affect efficacy, efficiency, quality, and acceleration of the decision-making process and also support the creation of a particular city development strategy. The paper puts also an emphasis on the review of AI applications within the concept of smart city in a big worldwide metropolies
