The embodiment of the invention provides a method, a device and a system for controlling a base station carrier frequency power amplifier, belonging to the field of network communication. The method comprises the steps of obtaining power control information of a carrier frequency power amplifier in a next timeslot, and regulating a working voltage of the carrier frequency power amplifier during the next time slot according to the power control information. The particular embodiment of the invention also provides a control device and a base station system of the base station carrier frequency power amplifier. The method, the device and the system have the advantages of reducing base station energy consumption and improving base station energy efficiency.