The invention discloses a power wireless communication system and communication method. The system comprises a plurality of communication base stations, a control center and a wireless terminal, wherein the communication base stations are connected with the control center through power lines in the way of power carrier; the wireless terminal is connected with the communication base stations through a wireless way; the communication base stations are data receive-and-send devices for power carrier communication and wireless communication, and are used for achieving the data exchange between the power carrier way and the wireless communication way; the control center is exchanging, controlling and managing central equipment for a power and wireless communication system, is used for controlling the data exchange with the communication base stations, and is convenient for the centralized management of data. The power wireless communication system and communication method can achieve a low-cost private power network through combining with carrier communication, make full use of existing power facility resources, be beneficial for lowering the construction cost of the private wireless power network, and achieve the efficiency and reliability of power communication and monitoring data transmission.