A system of controlling an induction electric motor in high speed region above a preset rated speed, the system comprising: an inverter configured for controlling the induction electric motor; an input unit configured for receiving a command speed for operating the induction electric motor at a high speed above a preset speed (W m *); a command voltage output unit (304, 305, 306) configured for generating a command voltage for operating the inverter based on the received command speed and outputting the generated command voltage to the inverter; a control unit configured for controlling the command voltage output unit (304, 305, 306) such that the command voltage output to the inverter is compared with a preset operation limiting voltage and the generated command voltage is corrected to fall within the preset operation limiting voltage, depending on a result of the comparison; characterized in, the system further comprising: a vector control system configured for receiving the command speed, calculating a command voltage according to the command speed received, correcting the command voltage calculated, through vector control, and outputting the command voltage corrected through the vector control to the inverter, wherein, when the command voltage output to the inverter is determined to be smaller than the preset operation limiting voltage, the control unit is configured for allowing the command voltage output through the vector control system to go into the inverter and blocking the command voltage output from the command voltage output unit (304, 305, 306). an inverter configured for controlling the induction electric motor; an input unit configured for receiving a command speed for operating the induction electric motor at a high speed above a preset speed (W m *); a command voltage output unit (304, 305, 306) configured for generating a command voltage for operating the inverter based on the received command speed and outputting the generated command voltage to the inverter; a control unit configured for controlling the command voltage output unit (304, 305, 306) such that the command voltage output to the inverter is compared with a preset operation limiting voltage and the generated command voltage is corrected to fall within the preset operation limiting voltage, depending on a result of the comparison; characterized in, the system further comprising: a vector control system configured for receiving the command speed, calculating a command voltage according to the command speed received, correcting the command voltage calculated, through vector control, and outputting the command voltage corrected through the vector control to the inverter, wherein, when the command voltage output to the inverter is determined to be smaller than the preset operation limiting voltage, the control unit is configured for allowing the command voltage output through the vector control system to go into the inverter and blocking the command voltage output from the command voltage output unit (304, 305, 306). a vector control system configured for receiving the command speed, calculating a command voltage according to the command speed received, correcting the command voltage calculated, through vector control, and outputting the command voltage corrected through the vector control to the inverter, wherein, when the command voltage output to the inverter is determined to be smaller than the preset operation limiting voltage, the control unit is configured for allowing the command voltage output through the vector control system to go into the inverter and blocking the command voltage output from the command voltage output unit (304, 305, 306).