The monograph presents the joint work of scientists from Vadym Hetman Kyiv National University of Economics (KNEU, Ukraine) and the Higher School of Information Systems Management (ISMA, Latvia) in researching the phenomenon of smart economy in a global environment. The theoretical foundations of the smart economy, its essence in the global paradigm of economic development, features and forms of manifestation at different levels are substantiated. The global experience of developing smart cities has been analyzed and summarized, the factors of their success have been determined, and approaches to the assessment and ranking of cities have been systematized. The author proposed methodical approaches to the assessment of the development of the smart economy in the countries of the world and provided the results of such an assessment. The key characteristics of the relationship between the green and smart economies, the peculiarities of the implementation of the ecosystem approach in the model of global economic development are determined. Conceptualization of the problems of assessing the development of the smart economy, comparative analysis of the progress of the smart economy in different countries of the world was carried out. Recommended for researchers, educators, government officials, and students interested in smart development in a global economic environment.