By　simply　adjusting　ethanol-water　reaction　medium　and　aging　time,　plenty　of　micro-nanometer　copper(II)　8-hydroxyquinolinate　materials　with　different　morphologies　and　crystalline　phases　were　prepared　rapidly　from　8-hydroxyquinoline　and　copper　acetate　via　liquid　precipitation　method.　The　prepared　products　were　characterized　by　SEM,　XRD,　UV-Vis　and　FT-IR　absorption　spectra.　The　results　showed　that　the　nanorod-like　α-form　copper(II)　8-hydroxyquinolinate　dihydrate　was　prepared　from　the　reaction　of　acidic　8-hydroxyquinoline　and　copper　acetate　aqueous　solution,　which　was　around　40-130　nm　in　diameter.　The　three-dimensional　(3D)　lath　bundle-like　α-form　anhydrous　copper(II)　8-hydroxyquinolinate　micro-nanometer　structure　with　a　thickness　of　each　lath　about　300　nm　was　prepared　from　the　reaction　of　8-hydroxyquinoline　ethanol　solution　and　copper　acetate　ethanol　solution.　Under　the　reaction　circumstance　of　8-hydroxyquinoline　ethanol　solution　and　copper　acetate　ethanol/aqueous　solution　with　a　total　volume　ratio　of　ethanol　to　water　of　3:1,　the　crystalline　phases　of　products　transformed　from　the　metastable　α-form　and　γ-form　to　the　stable　β-form　as　aging　time　extended,　while　their　morphologies　changed　from　beard　bundle-like　and　rhombohedral　structure　to　nanorod-like　and　rhombohedral　structure,　and　finally　grew　into　singular　rhombohedral　copper(II)　8-hydroxyquinolinate　dihydrate　flake　as　well　as　its　star-shaped　assemblies　after　aging　for　50　min.