An operation stabilization system for a foldable pedal apparatus of a vehicle includes: a first battery and a second battery disposed in the vehicle; a first vehicle controller and a second vehicle controller receiving power from the first battery and the second battery, respectively, and transmitting operation signals, respectively; a foldable pedal controller disposed in the foldable pedal apparatus to generate control signals by receiving the signals from the first vehicle controller and the second vehicle controller; and a first motor and a second motor disposed in the foldable pedal apparatus and connected to the first battery and the second battery to receive the power from the first and second batteries, respectively.