In　this　article,　hydrothermal　process　is　applied　to　synthesize　nanometer　InVO4.　Influences　of　different　experimental　conditions　(including　mixing　ratio　of　raw　materials,　reaction　temperature,　reaction　time　and　so　on)　upon　the　synthetic　products＇　purity　and　crystallite　size　are　discussed　to　determine　the　best　synthetic　condition.　The　structure　of　nanometer　InVO　4　is　analyzed,　which　helps　to　further　understand　the　structure　characteristics　of　InVO4　synthesized　by　applying　hydrothermal　process　and　lays　foundation　for　further　research.