Abstract: The present invention relates to an interaction method using eye tracking data, used in human-computer interface system with at least a screen configured to display at least user contents and eye tracking device to collect eye tracking data. The method comprising following steps: displaying selection keys on the screen, when there is a selecting interaction control signal of the user reflecting that the user intends to automatically change user contents being displayed on the screen; defining a selection key which the user wants to input based on at least the eye tracking data when the user inputs the selection key by eye gaze; automatically changing the user contents in a predefined changing manner corresponding to the selection key inputted by the eye gaze of the user, wherein said predefined changing manner selected from a group including at least scroll down, scroll up, scroll right, scroll left, zoom in, zoom out, turn the pages, move the pages, and insert new contents.