As　an　effective　tool　for　contactless　manipulation　of　submicrometer　scale　objects,　the　controllability　of　acoustic　streaming　velocity　and　flow　field　morphology　determines　the　accuracy　of　object　migration　and　the　completeness　of　three　dimensional　(3D)　imaging.　This　paper　proposes　an　equivalent　acoustic　streaming　driving　force　model　that　is　applicable　to　both　two　dimensional　(2D)　and　3D　calculations　and　constructs　a　numerical　method　for　submicrometer　microsphere　migration　and　rotation　velocity　in　acoustic　streaming.　The　results　show　that　the　relationship　between　the　peripheral　vortex　size　L-p/w(c)　and　the　relative　acoustic　streaming　velocity　v(as)/v(f)　satisfies　L-p/w(c)　=　0.125v(as)/v(f)(0.36)　under　certain　geometrical　conditions.　Reducing　the　spatial　confinement　and　increasing　the　inter-vortex　distance　will　increase　the　energy　release　efficiency,　reduce　the　pressure　gradient　distribution　and　convective　dissipation　rates,　increase　the　vortex　intensity　and　radiation　range,　and　consequently,　increase　the　vortex　characteristic　size.　In　complex　3D　vortex　flow　fields,　suspended　objects　are　affected　by　velocity　distributions　and　exhibit　motions　such　as　cross-flow　lines　and　rotation.　For　larger　vortex　structure　sizes,　full　3D　imaging　is　more　favorable　due　to　the　increased　rotation　speed　and　period　of　motion　along　the　orbit　of　the　submicrometer　microspheres.　This　study　helps　us　to　reveal　the　modulation　mechanism　of　acoustic　streaming　field　flow　characteristics,　enrich　the　basic　theory　of　alternating　orbital　motion　and　forces　on　objects　in　vortex　structures,　and　provide　guidance　for　acoustic　flow-based　contactless　object　manipulation.