The　catalytic　conversion　of　alkynes　into　ketones　via　hydration　has　received　considerable　attention,　because　the　ketones　are　very　important　intermediates　in　the　chemical　and　pharmaceutical　industries.　The　hydration　of　alkynes　was　usually　performed　with　rather　complicated　processes　in　presence　of　liquid　acids　or　highly　toxic　metal　catalysts.　We　report　here　a　novel　metal　free　and　efficient　route　to　conversion　of　alkynes　into　ketones　catalyzed　by　hierarchically　porous　poly(ionic　liquid)s　solid　strong　acids,　which　were　synthesized　from　one-step,　template-free　copolymerization　of　divinylbenzene　(DVB)　with　nitrogen　containing　monomers　under　solvothermal　condition,　further　by　post　grafting　with　strong　acid　ionic　liquid　groups.　The　porous　poly(ionic　liquid)s　solid　acids　have　large　BET　surface　areas,　hierarchical　nanopores　and　enhanced　acid　strength.　A　variety　of　alkynes　could　be　effectively　transformed　into　ketones　catalyzed　by　the　synthesized　porous　poly(ionic　liquid)s　solid　acids　under　green　and　mild　conditions,　which　were　much　better　than　those　of　Amberlyst　15,　phosphotungstic　acid　and　sulfuric　acid.　Furthermore,　the　porous　poly(ionic　liquid)s　solid　acids　also　show　excellent　activities　and　good　reusability　in　direct　hydroamination　of　amines　with　phenylacetylene.　This　work　largely　expands　the　wide　applications　of　porous　poly(ionic　liquid)s　solid　strong　acids　in　hydration　and　hydroamination,　which　develops　a　green,　efficient　and　cost　effective　approach　for　conversion　of　low　cost　alkynes　into　high-value　added　ketones.　©　2018　Elsevier　B.V.