A system for controlling the wireless charging power of electric vehicles in motion, comprising: a power supply cable for generating power for wireless charging by flowing an AC current; an inverter for controlling the supply of the AC current flowing through the power supply cable and including a relay unit for adjusting the phase of the AC current to 0 degrees or 180 degrees; and, characterized by one or more capacitor unit including a relay for adjusting the phase of the AC current to 0 degrees or 180 degrees under the control of the inverter, and a capacitor for offsetting the inductance of the power supply cable, wherein a first part of the power supply cable is connected between the inverter and the capacitor unit without returning to the inverter, when two or more capacitor units are provided, another part of the power supply cable is connected between the nth capacitor unit and the (n+1)th capacitor unit without returning to the nth capacitor unit, wherein a final part of the power supply cable is connected between the last capacitor unit and the inverter, wherein a power supply region is made between the inverter and the capacitor unit via the first part of the power supply cable and the final part of the power supply cable, when two or more capacitor units are provided, an additional power supply region is made between each capacitor units via the corresponding another part of the power supply cable and the final part of the power supply cable, wherein a final power supply region is made after the last capacitor unit via the final part of the power supply cable only, wherein each power supply region acts like a coil for generating power for wireless charging. a power supply cable for generating power for wireless charging by flowing an AC current; an inverter for controlling the supply of the AC current flowing through the power supply cable and including a relay unit for adjusting the phase of the AC current to 0 degrees or 180 degrees; and, characterized by one or more capacitor unit including a relay for adjusting the phase of the AC current to 0 degrees or 180 degrees under the control of the inverter, and a capacitor for offsetting the inductance of the power supply cable, wherein a first part of the power supply cable is connected between the inverter and the capacitor unit without returning to the inverter, when two or more capacitor units are provided, another part of the power supply cable is connected between the nth capacitor unit and the (n+1)th capacitor unit without returning to the nth capacitor unit, wherein a final part of the power supply cable is connected between the last capacitor unit and the inverter, wherein a power supply region is made between the inverter and the capacitor unit via the first part of the power supply cable and the final part of the power supply cable, when two or more capacitor units are provided, an additional power supply region is made between each capacitor units via the corresponding another part of the power supply cable and the final part of the power supply cable, wherein a final power supply region is made after the last capacitor unit via the final part of the power supply cable only, wherein each power supply region acts like a coil for generating power for wireless charging.