As　the　most　relevant　indicator　of　global　warming,　the　ocean　heat　content　(OHC)　change　is　tightly　linked　to　the　Earth＇s　energy　imbalance.　Therefore,　it　is　vital　to　study　the　OHC　and　heat　absorption　and　redistribution.　Here　we　analyzed　the　characteristics　of　global　OHC　variations　based　on　a　previously　reconstructed　OHC　dataset　(named　OPEN)　with　four　other　gridded　OHC　datasets　from　1993　to　2021.　Different　from　the　other　four　datasets,　the　OPEN　dataset　directly　obtains　OHC　through　remote　sensing,　which　is　reliable　and　superior　in　OHC　reconstruction,　further　verified　by　the　Clouds　and　the　Earth＇s　Radiant　Energy　System　(CERES)　radiation　flux　data.　We　quantitatively　analyzed　the　changes　in　the　upper　2000　m　OHC　of　the　oceans　over　the　past　three　decades　from　a　multisource　and　multilayer　perspective.　Meanwhile,　we　calculated　the　global　ocean　heat　uptake　to　quantify　and　track　the　global　ocean　warming　rate　and　combined　it　with　the　Oceanic　Nino　Index　to　analyze　the　global　evolution　of　OHC　associated　with　El　Nino-Southern　Oscillation　variability.　The　results　show　that　different　datasets　reveal　a　continuously　increasing　and　non-decaying　global　ocean　warming　from　multiple　perspectives,　with　more　heat　being　absorbed　by　the　subsurface　and　deeper　ocean　over　the　past　29　years.　The　global　OHC　heating　trend　from　1993　to　2021　is　7.48　+/-　0.17,　7.89　+/-　0.1,　10.11　+/-　0.16,　7.78　+/-　0.17,　and　12.8　+/-　0.26　x　10(22)　J/decade　according　to　OPEN,　IAP,　EN4,　Ishii,　and　ORAS5,　respectively,　which　shows　that　the　trends　of　the　OPEN,　IAP,　and　Ishii　datasets　are　generally　consistent,　while　those　of　EN4　and　ORAS5　datasets　are　much　higher.　In　addition,　the　ocean　warming　characteristics　revealed　by　different　datasets　are　somewhat　different.　The　OPEN　OHC　dataset　from　remote　sensing　reconstruction　shows　a　unique　remote　sensing　mapping　advantage,　presenting　a　distinctive　warming　pattern　in　the　East　Indian　Ocean.　Meanwhile,　the　OPEN　dataset　had　the　largest　statistically　significant　area,　with　85.6%　of　the　ocean　covered　by　significant　positive　trends.　The　significant　and　continuous　increase　in　global　ocean　warming　over　the　past　three　decades,　revealed　from　remote　sensing　reconstruction,　can　provide　an　important　reference　for　projecting　ocean　warming　in　the　context　of　global　climate　change　toward　the　United　Nations　Sustainable　Development　Goals.