1. A head mounted image-sensing display device, comprising: a pair of image-sensing units configured to stereoscopically capture a physical space and output a pair of stereoscopic images; a storage unit configured to store image-sensing parameters which include a convergence angle of each of the pair of image-sensing units and a base line length between the pair of image-sensing units, which are previously measured, for generating virtual images to be combined with the pair of stereoscopic images; a generation unit configured to generate the virtual images using at least one of the convergence angle and the base line length stored by the storage unit and three-dimensional model information, so as to arrange the virtual images correctly in each of the pair of stereoscopic images of the physical space captured by the pair of image-sensing units; a composition unit configured to generate composite images by combining the pair of stereoscopic images with the generated virtual images; and a display unit configured to display the composite images generated by the composition unit.