Increasingly more people are worried about the electromagnetic radiation of the communication network base station. The growing number of complaints has made base station siting difficult. This paper considered base station coverage and costs, while taking into account the impact of electromagnetic radiation on the environment of the base station. An optimized low electromagnetic radiation 3G network base stations site selection scheme was proposed in this paper. With the base station siting principles and an analysis of the electromagnetic radiation of typical base stations, this paper established a base station evaluation model based on multi-objective design optimization algorithm and proposed a 3G network base station site selection method based on improved immune optimization. A simulation area was set up for simulation tests. The results show that the proposed base station optimization program can not only meet the coverage requirements with relatively smaller construction cost, but also reduce the impact of electromagnetic radiation for better social benefits.