An image processing system includes a reception unit configured to receive an input of authentication information from a user, an authentication unit configured to authenticate the user based on the authentication information received by the reception unit, a setting unit configured to set a destination of image data, an operation key configured to set a folder of the user as a destination of the image data, and a transmission unit configured to send the image data to a destination set by the setting unit. The image processing system performs control not to allow a destination setting using the operation key, in the case where a destination to be set by the setting unit is limited to a destination to be set using the operation key and a folder to be set in response to an operation of the operation key is the one to be registered by the user.