1. A touch screen-based document editing device comprising: an editing symbol storage configured to store editing symbols used for editing an electronic document; a display for presenting configured to present the electronic document, the display being implemented as a touch screen for inputting an editing symbol insertion commands; a user interface configured to input, by a user, an editing request for editing the electronic document and an editing execution command; a video processor configured to manage presentation information of the electronic document, including spaces between text lines of the electronic document to increase a distance between each and every text line of the electronic document in an editing mode in response to the editing request, and presenting editing symbols on the spaces between the text lines of the electronic document in response to the editing symbol insertion commands; a video analyzer configured to extract the presented editing symbols and positions of the presented editing symbols in the electronic document according to the presentation information, in response to the editing execution command; an editing symbol recognizer configured to retrieve the presented editing symbols from the editing symbol storage and detecting editing commands corresponding to the presented editing symbols; and a document editor configured to execute the editing commands according to the presented editing symbols and the positions of the presented editing symbols, wherein the video processor controls the display to decrease the distance between the text lines to be the same as that before entering the editing mode.