一种通信系统，包括第一通信设备与第二通信设备。第一通信设备包括第一无线通信模块与第一低功率蓝牙模块，第一低功率蓝牙模块持续广播信标信号。第二通信设备包括第二无线通信模块与第二低功率蓝牙模块，当第二通信设备位于第一通信设备的广播范围中时，第二低功率蓝牙模块接收信标信号并侦知信号强度。当第二低功率蓝牙模块接收信标信号之信号强度大于阀值时，第二低功率蓝牙模块发出配对要求信号，第一低功率蓝牙模块接受配对要求信号并与第二低功率蓝牙模块配对成功连接后，第一低功率蓝牙模块发送通信识别信息给第二低功率蓝牙模块，或第二低功率蓝牙模块发送通信识别信息给第一低功率蓝牙模块。

A communication system includes a first communication device and a second communication device. The first communication device includes a first wireless communication module and a first bluetooth low energy module. The first bluetooth low energy module broadcasts a beacon signal. The second communication device includes a second wireless communication module and a second bluetooth low energy module. When the second communication device in a broadcast coverage of the first communication device, the second bluetooth low energy module receives the beacon signal and detects the signal strength. When the signal strength is greater than a threshold value. The second bluetooth low energy module sends a pairing requires signal. After the first bluetooth low energy module accept the pairing requires signal and successful connect to the second bluetooth low energy module. The first bluetooth low energy module sends a communication identifiable information to the second bluetooth low energy module, or the second bluetooth low energy module sends a communication identifiable information to the first bluetooth low energy module.