Smart city is a new type of smart city transformation under the ternary organic integration of social space, physical space, and information system. It uses a new generation of information technology to optimize the city system, enhance the city’s quality and comprehensive competitiveness, and achieve sustainable development. In recent years, although the construction of smart cities has also been attached increasing importance, it has not been as smooth as the smart transformation of other fields. The construction process is still faced with many problems, which restricts the city’s development to a certain extent. This study takes the urban-scale Happiness Forest Belt building as an example, outlines a smart operation management and control platform developed for this building, and presents a condensed reference technical framework for a smart platform to meet its needs in aspects of digitization, visualization, smartness, and open development frameworks. Finally, some suggestions are proposed on the basis of this experience for constructing an intelligent city operation management and control platform, and its potential critical technical requirements are put forward.