An object of the present invention is to improve usability of a copying machine. In order to achieve the object, an image processing apparatus according to the present invention has: accepting unit that accepts setting of a function from a user; first obtaining unit that obtains information of a function usable by the user; second obtaining unit that obtains information of a usable function by using a two-dimensional code of a document as an object of the function; and first executing unit that, even when the function that the accepting unit accepts setting thereof from the user is not included in the information of the usable function obtained by the first obtaining unit, executes on the document the function that the accepting unit accepts setting thereof when the function is included in the information of the usable function by the second obtaining unit.