Abstract: The author reveiws the works on study of the structure and nature of glass, done by the author and his colleagues,
in the past 20 years. Some important conclusions indicated that glass as the non-crystalline solid, its structure may contain two types of agglomerated
atoms or atomic groups, i.e., disorder groups and ordered orientated (one dimensionally prefered) groups. In addition, a little quantity (negligible)
of nano-crystals may appear as a particular role in real glass and this characteristic may distinguish it from ideal glass. A table is shown for
interpretating more briefly. A schematic diagram of fused silica glass structure is designed by the author and provided here, so, it may express the stucture and nature of
glass with its reasonable scientific recognition.

Key words: real glass and ideal glass, ordered orientation and disorder, crosslink and agglomerate, nano-crystal