The invention discloses a radio-frequency automatic impedance matcher and semiconductor equipment. The radio-frequency automatic impedance matcher can comprise a radio-frequency sensing unit, a control unit and a matching unit, wherein the radio-frequency sensing unit is used for acquiring a voltage signal and a current signal on a radio-frequency transmission line and outputting a plurality of digital signals which are operated and converted to the control unit, the control unit is connected to the radio-frequency sensing unit and is used for receiving the plurality of digital signals of the radio-frequency sensing unit, determining a state of the radio-frequency transmission line and adjusting the matching unit, and the matching unit is connected to the control unit and is used for adjusting impedance of an input end of the radio-frequency automatic impedance matcher according to the signal of the control unit, and the radio-frequency sensing unit can be used for outputting four different digital signals to the control unit.