This　paper　presents　a　review　of　recent　research　and　development　progress　on　green　hydrogen　energy　systems　and　associated　thermal　management　and　waste　heat　recovery　technologies.　First,　hydrogen　production　methods　are　briefed.　Second,　various　electrolysis　systems　used　for　carbon　free　hydrogen　production　from　renewable　and　nuclear　resources　are　discussed.　Then,　hydrogen　utilization　using　proton-exchange　fuel　cells　is　scrutinized.　Next,　hydrogen　energy　systems　integrated　with　metal　hydride　energy　storage　are　elaborated.　A　focus　of　this　review　is　on　thermal　management　and　process　intensification　technologies　for　hydrogen　energy　systems　and　integrated　metal　hydride　hydrogen　storage　technologies.　Various　process　and　heat　transfer　enhancement　techniques　for　heat　removal　and　utilization　are　presented.　Advanced　cooling　technologies　for　hydrogen　energy　systems　such　as　two-phase　and　boiling　for　cooling,　microchannels　for　heat　removal,　CO2　air　conditioner　and　using　nanofluids　for　heat　removal　are　discussed.　Finally,　heat　recovery　technologies　in　green　hydrogen　energy　systems　are　summarized.　This　review　has　also　identified　future　research　and　technology　development　needs　for　green　hydrogen　energy　utilization,　thermal　management,　and　heat　recovery　systems.