Abstract: A radio-frequency mouse is used for receiving an electromagnetic wave transmitted by an electronic device. The radio-frequency mouse includes a RF transceiver, a sensor, a micro-controller, a battery, and a power management circuit. The RF transceiver receives and converts an electromagnetic wave into a RF power. The sensor outputs an operation signal according to an operating condition of the RF mouse. The micro-controller transfers an operation signal to the RF transceiver, and the RF transceiver transmits the operation signal to the electronic device. The power management circuit receives the RF power, and selectively supplies the RF power or the battery power of the battery to the sensor and the micro-controller according to RF power. Thus, when the RF power is higher than a preset value, the RF mouse is supplied with power, thereby saving the battery power of the RF mouse and improving a battery life of the RF mouse.