A　facile　microwave-assisted　precipitation　method　was　used　to　synthesize　hierarchical　WO3　center　dot　H2O　using　urea　as　the　shape　control　agent.　The　morphologies　of　WO3　center　dot　H2O　can　be　controlled　by　tuning　the　concentration　of　urea.　For　model　dyes　of　methylene　blue　(MB),　rhodamine　B　and　methyl　orange　which　possess　different　sizes　and　charges　in　solution,　WO3　center　dot　H2O　exhibits　excellent　selective　adsorption　capacity,　especially　for　MB.　The　adsorption　kinetic　and　adsorption　isotherm　could　be　described　by　the　pseudo-second-order　kinetic　model　and　Langmuir　adsorption　isotherm　model,　respectively.　The　experimental　results　indicate　that　the　maximum　uptake　capacity　of　the　flower-like　WO3　center　dot　H2O　for　MB　is　478.34　mg　g(-1)　in　neutral　pH,　which　is　higher　than　many　literature　reports.　In　addition,　the　adsorption　mechanism　of　WO3　center　dot　H2O　is　proposed.　[GRAPHICS]　.