Since cities act as centers of energy consumption,the city energy revolution occupies the core position in the revolu.tion of energy production and consumption.The smart energy systemof cites, which is the integration point of city upgrading and energytransition, is bound to have vast development space.The issues ofrole change of energy in the construction and development of cities,consumption pattern upgrading, application of new techniques, inno.vation of industry formats, as well as policy reforms will accompanythe whole process.With a view to challenges faced by city energyrevolution, the future integrated energy system of cities from the an.gles of development potential, design thinking, key points of con.struction and so on are prospected.