In　this　paper,　a　wavelet　transform-based　energy　management　strategy　(EMS)　governing　fuel　cell　(FC)/variable-structure　super-capacitor　(SC)　hybrid　power　system　prototype　is　developed　to　apply　for　city　bus.　The　hybrid　power　system　integrates　FC　as　the　main　power　source　and　the　variable-structure　SC　as　the　auxiliary　power　source,　where　SC　modules　are　connected　in　series　acting　as　a　power　supply　and　in　parallel　under　charging　conditions.　Wavelet　transform　EMS　is　proposed　to　distribute　the　demand　power　into　high　frequency　power　and　low　frequency　power.　The　high　frequency　power　is　absorbed　by　variable-structure　SC.　Rule-based　control　is　also　used　to　further　process　the　low　frequency　power,　ensuring　the　output　power　and　the　power　change　rate　of　FC　in　a　reasonable　range.　The　simulation　results　show　that　the　variable-structure　SC＇s　energy　recovery　current　is　improved　59.4%.　At　the　same　time,　the　output　power　of　FC　is　less　than　120　kW　and　the　maximum　power　change　rate　is　about　5　kW/s,　which　demonstrates　the　proposed　EMS　with　the　hybrid　system　can　effectively　guarantee　the　power　demand　and　dynamic　response.　©　2020　IEEE.