Chemical　looping　hydrogen　generation　(CLHG)　is　a　hydrogen　production　process　with　broad　prospects　for　its　advantages　of　not　requiring　H2　purification　process　and　direct　CO2　capture.　Presently,　the　research　on　the　integrated　system　of　CLHG　focuses　on　the　impact　of　integrated　processes　and　operating　variables　on　the　overall　energy　efficiency　and　exergy　efficiency　of　the　system.　However,　the　research　on　the　matching　relationship　between　quantity　and　quality　in　the　process　of　energy　conversion　is　insufficient,　and　the　flow　direction　of　exergy　and　the　specific　exergy　destruction　process　for　equipment　are　not　clear.　The　integrated　system　of　coal　gasification　(CG)　and　three　reactors　CLHG　was　established　in　this　paper　with　a　hydrogen　production　efficiency　of　42.55%　and　system　exergy　efficiency　of　52.98%.　This　paper　studied　the　exergy　flow　direction　and　efficiency　of　the　equipment　in　the　system,　providing　the　improved　direction　for　the　amelioration　of　the　system;　a　detailed　description　was　present　on　the　change　process　of　energy　quality　in　each　equipment　with　energy　quality　factor,　and　the　concept　of　energy　quality　factor　ratio　was　proposed　as　an　evaluation　tool　for　matching　the　quantity　and　quality　of　energy　in　the　system.　It　is　calculated　that　the　ratio　of　energy　quality　factor　of　the　integrated　system　of　CG　and　CLHG　is　0.944.　By　comparing　with　the　energy　quality　ratio　of　the　traditional　CG　hydrogen　production　system　(0.896),　it　can　be　concluded　that　the　integrated　system　of　CG　and　CLHG　has　a　better　energy　matching　relationship.　©　2020　John　Wiley　&　Sons　Ltd