The utility model relates to a GSM network energy saving optimization system, comprising a base station, a telephone traffic statistical circuit connected with an uplink signal of the base station, a one-chip microcomputer connected with the telephone traffic statistical circuit, a memorizer and an electronic switch circuit connected with the one-chip microcomputer respectively; wherein, the electronic switch circuit is connected with the base station. In the utility model, the telephone traffic information obtained by utilizing the telephone traffic statistical circuit in the prior art is transmitted to the one-chip microcomputer, and the one-chip microcomputer controls the on-off of the electronic switch circuit according to the preset threshold value information in the memorizer to thereby control the network signal output of the base station; when the network is free, the GSM network operation cost can be reduced to thereby reduce the energy consumption and achieve the purpose of energy saving and emission reduction.