The invention discloses a method for generating a network security warning distribution map. The method comprises: establishing a warning circle, establishing a plurality of time circles in the warning circle, and establishing risk arcs on the time circles; establishing an asset areal map in the warning circle, displaying a risk occurrence coordinate in the asset areal map, and connecting the risk arcs with the point where the risk occurrence coordinate is; according to a preset period, updating a risk node and showing the risk node in a carrier in a dynamic manner. Through the method, a user can intuitively know real-time risk conditions of a network environment from spatial-temporal dimensionality. The invention also discloses a system for generating a network security warning distribution map, and the system has the above beneficial effects.