Abstract: Recently in developing countries,discussions of urban low-carbon information governance have long been focused on aspects of system, strategy, urban form and culture at a macro-level, and limited to aspects relating specific energy-saving techniques at a micro-level. As the basis to achieve carbon reduction targets, data processing and calculation of carbon emissions with advanced technology is still lagging, especially the lack of data from end-users. Therefore, both the construction and the implementation of urban low-carbon information governance system have proven difficult. Through a combination of international research and experience, this paper proposes an approach to building the urban low-carbon information governance system based on smart techniques with the performance of end-users. Relying on three aspects of carbon regulatory mechanisms, the dynamic and static carbon regulatory model and the urban low-carbon information regulatory platform, this paper specifically addressed: 1. the realization to monitor atmospheric CO2 concentration, distribution and trends. 2. The process of information collection, transmission, decision-making and feedback. 3. The system's implementation path including carbon emissions governance, energy governance, traffic governance, and building governance. The system facilitates the implementation of urban low-carbon governance and provides a new way for re-thinking the combination of Low-carbon City and Smart City.