1. A form processing method of editing at least one target field in a form, the form processing method comprising the steps of: determining a type of the form; determining whether an editing instruction is given to edit the target field interdependently with a related field relating to the target field, if the form type is a predetermined form type; and editing the target field interdependently with the related field if it is determined that the editing instruction is given to edit the target field interdependently with the related field.