As a smart city and big data integration and operation service provider, Leador proposed the pioneered concept of "Smart City Operations Center" as early as 2013 in the journal of information technology and explored a new theory basedon integrating operation data with geographic information to assist governmentsin the guarantee work of organizational structures designation, systemformulation and specification drafting for "data governance." DigitalTwin City IOC constructs a sharing service platform based on spatio-temporaldata and integrates big data of government affairs to realizes quantifiable,traceable, assessable for multi-source heterogeneous data to dynamicallypresents data results in a visual way and provide practical solutions for thedifficulties in the data integration of smart cities.