The properties and the developments of synthesises and applications in propellants and gas generators of energetic materials (ammonium azotetrazolate(AZT),guanidinium azotetrazolate(GZT),triaminoguanidinium azotetrazolate(TAGZT) and so on) were summarized. TAGZT with the advantages of reducing the combusting temperature,enhancing the burning rate of the propellant,producing a lot of gases and exhibiting good detonating performances is supposed to be widely used in the field of explosives,propellants and gas generators. GZT with the advantages of reducing the combusting temperature and producing a lot of gases has been widely used in gas generators.