High　internal　phase　emulsion　(HIPE)　templating　is　a　versatile　strategy　to　prepare　porous　polymers　and　carbons.　However,　the　prepared　porous　carbon　materials　usually　show　low　specific　surface　area　(SSA)　due　to　the　feature　of　macropores,　which　hampered　their　wider　applications.　This　work　developed　a　novel　strategy,　namely　internal　phase-external　phase　coefficient　HIPE　(IP-EP　coHIPE)　templating,　to　prepare　polymer-derived　hierarchically　porous　carbons　(HPCs)　with　high　SSA.　In　the　strategy,　sodium　alginate　(SA)　aqueous　solution　was　selected　as　the　internal　phase　and　emulsified　in　external　oil　phase　containing　divinylbenzene　(DVB).　HPCs　were　obtained　by　sequentially　polymerizing　the　external　phase,　crosslinking　the　internal　phase　and　carbonization.　The　testing　results　indicated　that　this　strategy　provided　HPCs　with　notably　enhanced　porosity　and　increased　SSA　when　compared　with　conventional　HIPE　method　via　the　further　utilization　of　the　void　space　of　polyHIPE-based　HPCs　via　a　facile　way.　The　porous　architectures　of　HPCs　can　be　adjusted　by　changing　the　volume　fraction　and/or　the　concentration　of　the　internal　phase,　respectively.　The　potential　applications　of　the　obtained　HPCs　were　evaluated　as　the　electrode　material　of　supercapacitor.　The　specific　capacitance　of　optimized　HPC-based　supercapacitor　is　306　F/g,　much　higher　than　that　based　on　general　polyHIPE-derived　HPC　(145　F/g)　at　1　A/g,　which　can　be　attributed　to　its　enhanced　porosity,　hierarchically　porous　architecture　and　high　SSA　(2289　m(2)/g).