Abstract: The reverse distribution characteristics of China's power supply and demand, as well as the establishment of the cross-regional & cross-provincial transmission network racks, to a certain extent determine the optimal model of China's power resources. With the gradual clarity of China's carbon emission reduction vision, it's of further highlighted importance to establish a unified national power market-oriented operation system. The core issues of the mature power markets in Europe and North America are analyzed, including the market development courses the incentive modes of market participants, the basic ideas of market designs, the safety of market clearing results, the mechanisms of market clearance and timing convergence. Considering the impacts of carbon reduction targets on the market operation in various countries, this paper analyzes the fused development of the power markets in Europe and the United States under the constraints of carbon emission reduction. The key problems about the construction of the unified electric power market in our country are discussed. The solutions based on different basic conditions of market operations are put forward, such as China's hierarchical dispatching model, the differential transmission price systems between provinces, and the province's responsibility for power balance.