The present invention relates to a document processing system using augmented reality and virtual reality, and a processing method therefor. The document processing system of the present invention shares contents of an object so that one user can write the contents of the object at the location of the object displayed in an augmented reality or virtual reality image to write and store various types of virtual documents and allow other users to view the virtual documents in the augmented reality or virtual image. The document processing system writes and shares the virtual documents by using a mobile terminal capable of expressing augmented reality or virtual reality. The document processing system shares the virtual documents between mobile terminals in a P2P method or a method of using a server. According to the present invention, a new document sharing platform can be implemented to provide a differentiated service to a user by displaying a virtual document written by using augmented reality or virtual reality to be shared in real time.