In the digital era，how to better link citizens’ demands and cities has become a fundamental issue in urban governance. So far，digital technology-driven urban governance innovation in China has formed rich and diverse achievements in various places，one of which is the “IoT-enabled City” model led by technology enterprises with the core of sensing objects in urban space. On the contrary，Beijing’s Immediate Action on Request reform，based on its 12345 citizen service hotline，shifts its emphasis from objects to the people in the city. With the philosophy of humanism，Beijing aims to reform its mega-city governance driven by citizens’ demands. Its reform has developed several mechanisms including the leadership of party-building，people-centered，technology-empowered，and data-driven，resulting in a new model of smart cities：“People-oriented City”. With these mechanisms，Beijing’s reform significantly improves the perceptions of the subjective world and social system in urban space and enhances its capacities of understanding citizens，risk prevention，and scientific decision-making. Beijing’s reform has become a revolution of urban governance driven by citizens’ demands.