The invention belongs to the technical field of storage battery production and processing. The invention discloses a paste mixing auxiliary material adding system and method; a server and a bar code scanning system are arranged, a paste mixing machine, a paste mixing formula and auxiliary materials are numbered in an associated mode, when the auxiliary materials are added, whether the auxiliary materials belong to the formula and the machine or not is judged by scanning bar codes in advance, and then whether the next step is executed or not is judged. The system and method have the beneficialeffects that 1, linkage mistake proofing among materials, weight, devices and the formula in the paste mixing auxiliary material adding process can be achieved, auxiliary material adding mistakes in the paste mixing process are effectively avoided, videos are shot and stored synchronously, traceability of the auxiliary material adding process can be achieved, and mistake analysis and responsibility confirmation are facilitated; and 2, a bar code of a to-be-added material is confirmed, the weight and sequence of the to-be-added material in the step are confirmed to be correct through a preset program, and errors possibly occurring in the adding sequence in the production process are avoided.