Network topology planning method and device

The invention discloses a network topology planning method and a network topology planning device, which solve the problems of incapability of performing automatic topology planning on topological network elements with different capacities and incapability of automatically planning network elements with the same capacity in a differentiation mode. The method comprises the following steps of: when the capacity of a polygon is in a preset range, taking the polygon as a determined planning region; when the capacity of the polygon is lower than the lower limit of the preset range, taking the polygon as a first region, and performing the next step until a second region is determined as the determined planning region when the capacity of the second region is in the preset range; selecting the polygon from adjacent polygons in the first region, and adding the polygon into the first region to generate the second region, wherein the second region and the polygon which is not added into the second region have the lowes