An image processing apparatus which makes it possible to realize easy accessing of registered information of any function and provide a user interface having high operability. The image processing apparatus stores setting information configured via an operating section and access information for use in accessing the setting information in association with each other. Further, the image processing apparatus stores the setting information and button information in association with each other. The button information is displayed on a touch panel in a user selectable form. When an item of the button information displayed on the touch panel is selected by a user, a portal application detects the access information associated with the selected button information item. The setting information is acquired based on the detected access information. The image processing apparatus performs image processing based on the acquired setting information.