Disclosed herein is a technique for controlling a side step operation for a vehicle. The technique includes detecting, by a controller, whether an obstacle is present in a space where left and right side steps are configured to be released, before ejecting release operation thereof is performed. The technique additionally includes releasing, by the controller, the side step only when the obstacle is not present. When the side step is not released due to an obstacle, a warning mode for re-parking or mobility parking is displayed to a user.