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Generally, when an earthquake occurs, rescue operations cannot be effectively conducted timely due to the interruption of communications. This paper proposes a novel communication approach, wireless mesh network (WMN) communication, which can provide network access for emergency rescue services after the earthquake to satisfy the communication requirements of rescue work. Simultaneously, when the wired networks or mobile networks have been recovered at a later time, rescue workers could also connect to the wired network or mobile network to provide continuous communication services. Two typical wireless mesh network topologies are designed and simulations are performed respectively. The performances of different business deployment in WMN are analyzed. Respective application areas of different topologies are pointed out.