In an image processing apparatus for performing “renewal designation” for designating a parameter group in accordance with a parameter group already designated, as well as usual “designation” in which an operator designates a desired parameter group, the parameter group, which is subjected to the renewal designation, is associated with the parameter group that is an original parameter group for the renewal designation. In the event a plural number of times of renewal designation is made in accordance with the same parameter group, a plurality of parameter groups is associated with one another on a parallel basis and is saved. Thus, the parameter groups, which are subjected to designation and renewal designation, are not erased and saved on a hierarchical basis. Accordingly, it is possible to restore trial all parameters.