An apparatus for filling insulation material consists of a vibrating means; a lift driving means for lifting the vibrating means; a horizontal transporting means for horizontally transporting the vibrating means and the lift driving means along the guide rail of the storage tank; an automatic winding means; a level sensing means for checking the amount of filling of the insulation material; a flux preventing means for securely maintaining the flux in the horizontal direction and verticality of the vibrating means; a descending position sensing means for restricting the descending position of the vibrating means by touching the insulation material; a control means for checking the amount of the insulation material filled along with automatically remote controlling the vibrating means, the level sensing means and the lift driving means; and a display means for directly observing the inside through a camera.