A quantum supermemory is based on the cells of nanostructured material. The nanostructured material includes consists of clusters with tunnel-transparent coatings. The clusters have sizes at which resonant electron features are manifested. The size is determined by the circular radius of the electronic wave, according to the formula r.sub.0=/(m.sub.e.alpha..sup.2c)=7.2517 nm, where is the Plank contstant, m.sub.e is the electron mass, .alpha.=1/137,036 is the fine structure constant, c is the speed of light. The cluster size is set within the range r.sub.0=4r.sub.0, and the width of the tunnel-transparent gap is less than r.sub.0=7.2517 nm. The nanostructured material stores energy (charge) uniformly along its whole volume with the specific density of 1.66*10.sup.3 J/cm.sup.3. Based on this material energy-independent rewritable memory is obtained with the writing density up to 28 Gbyte/cm.sup.2, the maximum working temperature being 878.degree. C. and the maximum timing frequency being 175 Ghz.