The invention provides an anti-theft system and a method of electric power facilities of base stations. The system consists of signal acquisition equipment and a back-stage management centre, wherein, the signal acquisition equipment consists of a power-off detector, a voltage sensor and a monitor. The input ends of the power-off monitor and the voltage sensor are connected with the electric power facilities of the base stations while the output ends are connected with the monitor. The monitor is connected with the back-stage management centre by a wired or wireless network. The system uses the signal acquisition equipment and the back-stage management centre, which are connected by network, to realize acquisition of theft signal and timely data transmission so as to carry out theft situation judgment. Instead of providing the invention on an electric power facility, the system can be installed indoors. Therefore, the system is convenient for assembling, free of interference from severe external environment, longer in service life and higher in data acquisition precision. Simultaneously, rational expansion can be adopted to use only one set of equipment to monitor a plurality of electric power facilities, thus ensuring convenience and practicability of the system.