The present invention relates to a high-frequency electric treatment apparatus and a treatment method, and more particularly, when the current value is constant, the difference value (V1-V2) between the voltage value of the active electrode (V1) and the voltage value of the return electrode (V2) It relates to a high-frequency electric therapy device and a treatment method capable of inducing effective treatment and treatment by controlling the appropriate frequency output to the affected part of the patient by measuring the impedance value of the affected part according to the difference voltage value, and generating high-frequency energy. A high frequency energy generation unit, a high frequency energy control unit that controls the output of the high frequency energy generated by the high frequency energy generation unit, receives the high frequency energy whose output is adjusted from the high frequency energy control unit, and injects the high frequency energy to the affected area when contacting the affected area It may include an electrode part including an active electrode and a return electrode, an active electrode voltage detector for measuring a voltage value of the active electrode, and a return electrode voltage detector for measuring a voltage value of the return electrode. In addition, the present invention is a high-frequency electric treatment method for treating and treating the affected area by detecting a voltage value by applying an active electrode and a return electrode to the affected area of a patient, and applying appropriate high-frequency energy to the affected area based on the detected voltage value. Applying an active electrode to one side of the affected area and a return electrode to the other side, measuring the voltage values of the active electrode and the return electrode, and measuring the difference between the measured voltage values of the active electrode and the return electrode to determine the impedance value of the affect
