© 2022 IEEE.With the ever-increasing energy demand, the electric power sector and the energy industry are promoted to decentralization, decarbonization and digitalization. The digital platforms gradually become a megatrend for a clean energy system. Digitalization of the energy systems has conducted changes in various dimensions such as energy savings, sustainability and security. In this paper, the impact of digitalization on the electric energy systems, electric vehicles (EVs), sustainable development goal (SDGs) and greenhouse gas (GHG) emissions are analyzed and investigated. A systematic overview and discussions on the key drivers for digitalization and decentralization of energy systems are addressed. This paper provides significant insights for digitalization of the energy systems from a global perspective. Some enable, challenges and solutions are also handled to analyze the impact of digitalization.