WO3　micro/nanostructures　were　synthesized　by　a　facile　paper-assisted　calcination　method,　which　combined　the　merits　of　wet　chemical　and　thermal　decomposition.　The　morphology　of　WO3　micro/nanostructures　can　be　varied　by　adding　inorganic　ions.　Various　microscopic　and　spectroscopic　techniques　were　employed　to　characterize　the　WO3　micro/nanostructures.　Methylene　blue　(MB)　photodegradation　experiments　showed　that　the　WO3　micro/nanostructures　possess　excellent　visible-light-driven　photocatalytic　ability,　and　the　excellent　photocatalytic　abilities　(up　to　95%)　of　WO3　micro/nanostructures　under　visible　light　irradiation　seem　corresponding　to　oxygen　vacancies,　band　gap　value　and　surface　area　etc.　The　method　in　this　work　shed　light　on　convenient　fabrication　of　micro/nanostructured　materials　for　environmental　remediation.