The interrelations between ionic conductivity, network expansion, medium-range-order, and average electronegativity in superionic glasses are discussed. It is shown that salt doping in glassy matrix results in the decrease of the average electronegativity, increase of the network expansion, increase of the ionic conductivity, and decrease of the wave number of first sharp diffraction peak. A scaling behavior of ionic conductivity and network expansion when arranged against the average electronegativity is also found.