1. An apparatus for providing mixed reality contents for learning through a story-based virtual experience, comprising: an image camera configured to pick up a user image under an actual environment; a virtual environment setting unit configured to set an action zone in which the user is synthesized with an image of a virtual world having the story and set a corner coordinate of the action zone as a reference point; a user position tracking unit configured to track a user position from the user image picked up by the image camera to calculate the tracked position as four rectangular corner coordinates; a 3D coordinate converting unit configured to convert the user position calculated through the user position tracking unit into a 3D coordinate; and a synthesis unit configured to provide mixed reality contents in which the image of the virtual world and the user image are synthesized by matching the user position converted through the 3D coordinate converting unit based on the corner coordinate of the action zone.