The northern land of the lunar Mare Imbrium is the second mountain ring around the Imbrium multi-ring basin, and the average elevation is about -1 km. Masses of the ejecta from Sinus Iridum and Crater Plato caused severely non-uniform elevation of this area, which is clearly shown by the DEM. The craters located in this area are counted and divided into four groups based on the depth/diameter ratios. The features of the geological structure and evolution history of this area were summarized, and it  concluded that there do exist mare-like lands on the Moon.