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This dissertation is composed of six parts as following: Part one: reviewIn this part, the history, structure, classification and future opportunities of heteropoly compounds were reviewed and the research state of heteropoly compounds containing the Va elements as heteroatom and organic-inorganic hybrids of isopolyoxovanadates was summarized. Part two: Synthesis and Characterization of Cadmium-Substituted Compounds of Heteropolytungstates with SbIII and BiIII.In this part, the title compounds, Na10[Sb2Cd2W20O70（H2O）6]·34H2O and Na6H4[Bi2Cd2W20O70（H2O）6]·24H2O, were synthesized and reported for the first time. The new preparative heteropoly compounds were characterized by using chemical analysis, IR, UV and TG. Compound of Na6H4[Bi2Cd2W20O70（H2O）6]·’24H2jO was studied by using single-crystal X-ray diffraction.Part three: Synthesis and Characterization of Organic-Inorganic Complex of [Co（phen）3]2[H2V10O28]·14H2O.In this part, the title compound, [Co（phen）3]2[H2V10O28]·14H2O （phen = phenanthroline） was synthesized under hydrothermal conditions and it was characterized by using single-crystal X-ray diffraction, chemical analysis, IR and TG. The crystallographic data are as follows: monoclinic, space group C2/c, unit cell a = 2.664（2）nm, b = 1.5103（12）nm, c = 2.3427（18）nm, V = 8.975（12）nm3, Z—4, Dc, = 1.784g/cm3. The title compound provides a novel sandwich-like structure formed by 2D layered array of decavanadate polyanions and complex fragments [Co（phen）3]2+.Part four: Synthesis and Characterization of Heteropolytungstates with Bi3+ containing Lanthanide.In this part, five compounds of heteropolytungstates with Bi3+ containing lanthanide were synthesized and characterized by IR, UV and TG.Part five: Synthesis and Characterization of Three Organic-Inorgnic Complexes of IsopolyoxovanadatesIn this part, three organic-inorgnic complexes of isopolyoxovanadates were synthesized under hydrothermal conditions and they were characterized by using chemical analysis, IR and TG. Part six: Synthesis and Crystal Structure of Isopolyoxotungstate Nai2Wi2O42#16H2OIn this part, isopolyoxotungstate, Nai2Wi2O42-16H2O, was synthesized and characterized by using single-crystal X-ray diffraction. X-ray analysis shows that it belong to triclinic, space group P-l, unit cell a=1.0586（17） run, ft=1.1878（19）nm, c=1.2295（19）nm, F=1.367nm3, Z=l,Z)c= 4.182g/cm3.
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