Despite the high temperatures associated with the warming climate, there are also occurrences of low temperatures.A persistent low temperature in summer 2014 is typical of recent years.The three-dimensional structure of the low temperature and anomaly in large-scale circulation is investigated using station observations of temperature over China, NOAA observations of sea surface temperature, and NCEP/NCAR reanalysis data.It has been shown that the low temperature anomalies in the near-surface layer are not only regionally located in the Yangtze River Basin, but can extend to the ocean in a large-scale belt pattern.The abnormality belt is not only visible near the surface, but also at all atmospheric levels (925-500 hPa).Based on the analysis, the low temperature in the atmosphere is largely due to anomalous systems at high latitudes.In the geopotential height field, the belt-like positive anomalies at 60°N may induce the inflow of colder-than-normal air in its southern region from the north or northeast.At all levels, the geopotential height shows positive anomalies.Accordingly, there are negative geopotential anomalies at low latitudes (40°N).A region of low temperatures lies between them, and all levels exhibit this distribution pattern.There is an overall tilt in these systems from the near surface to the upper levels, resulting in a large-scale front-like vertical cross-section, which a simple conceptual model can explain.The vertical structure may be maintained by the interaction between the dynamics and thermodynamics in the atmosphere.