An apparatus and method for generating summary data of an e-book or e-note, the method including if input data is received, recognizing a type of the input data, extracting a character region in the e-book or e-note corresponding to the recognized input data type, storing page information corresponding to the extracted character region, and generating summary data by using the page information corresponding to the character region when the generation of the summary data is requested, thereby allowing a user to preview summary content handwritten by the user on the e-book or e-note at a glance.