The invention discloses a method for automatically mapping a communications system map, which comprises the following steps: step 1, a topological diagram is established, that is, an optical cable topological diagram and/or an optical fiber topological diagram is respectively established according to different users; step 2, the topological diagram is produced, that is, the optical cable topological diagram and/or the optical fiber topological diagram is respectively produced; step 3, the produced topological diagram is saved in a data base; and step 4, the topological diagram is operated, that is, the topological diagram in the base is viewed or previewed, or a true device of the topological diagram is positioned, or the topological diagram operation is canceled. The method can produce an optical cable or an optical fiber topological schematic diagram, thereby connecting the resources inspection system with a pattern, increasing work efficiency and reducing labor force.