With the construction promotion and business promotion of 4G network, data services and voice services gradually shift to the 4G network. According to the development trend of the network, the business carried by 2G network will become more and less until eventually disappear. In this process, there should be a clear idea of the development of 2G network: how to assist the growth of 4G network while rationally allocating the original resources, and how to improve the efficiency of refarming the 800m and 900m frequency. This thesis discusses on the development strategy combining with the characteristics of 2G network and the development of 4G network.