A control device for measuring power quality used in distribution lines according to an embodiment of the present invention comprises a current and voltage sensor unit for converting first voltage into second voltage and first current into second current through distribution lines and for wirelessly transmitting the converted second voltage and the second current; and a power quality measuring unit receiving the second voltage and the second current from the current and voltage sensor unit, comparing the second voltage and the second current with a predetermined reference measuring value, and wirelessly transmitting the measured data included in the predetermined reference value to a centralized control system. The current and voltage sensor unit includes a current signal conversion unit for converting the first current into the second voltage which is proportional to a current change using a rogowski coil for wide-range current measurement; a main power unit for supplying the main power by converting the first voltage into the predetermined voltage using the induced electromotive force; and a sensor control unit for converting the main power into the operating power by receiving the main power from the main power unit and for wirelessly transmitting the second voltage by receiving the second voltage and the second current from the current signal conversion unit.
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