PURPOSE: An induction motor controlling apparatus is provided to control an induction motor according to control data which is automatically detected according to the need for controlling the induction motor. CONSTITUTION: An induction motor controlling apparatus comprises a current transformer(110) which generates R, S and T current signals each corresponding to three-phase AC currents provided to an induction motor(190) through R-, S- and T-phase lines. A zero current detector(120) detects a zero current between the three-phase AC lines. An analog-digital converter(130) converts the R, S and T current signals from the current transformer(110) and the zero current signal from the zero current detector(130) into digital signals. A display(150) displays a control state of the induction motor(190). An EEPROM(140) stores data necessary to control the induction motor(190) under the control of a micro controller(180). A communication device(170) is connected to an external communication network so as for the micro controller to communicate with an external device.