A motor control system includes a power supply to supply current to a motor, a shunt resistor provided at one side of the motor to measure the magnitude of current supplied to the motor, a differential amplifier to receive a voltage applied to both ends of the shunt resistor as an input signal and amplify the input signal, an Analog/Digital Converter (ADC) to convert an analog signal generated from the differential amplifier into a digital signal, a switch to switch current applied to the motor by the power supply, and a microcontroller to generate a Pulse Width Modulation (PWM) control signal so as to control ON or OFF of the switch and generate an operation start signal of the ADC by considering the PWM control signal and a hardware delay value of the differential amplifier.