A method for automatically integrating digital data obtained from the interaction between an image pickup apparatus and a data-processing apparatus is provided. The method includes steps of opening a file; picking up the image of a first object to provide first image data; converting the first image data into first digital data; automatically saving the first digital data into the file; picking up the image of a second object to provide second image data; converting the second image data into second digital data; and automatically saving the second digital data into the file including the first digital data. It is especially convenient for users to manage documents more than one page.