The　practical　application　of　lithium-rich　layered　oxides　is　prohibited　by　the　drawbacks　such　as　severe　capacity　and　voltage　degradation　resulting　from　unstable　oxygen　redox　environment　and　the　accompanied　irreversible　oxygen　release.　Herein,　a　facile　and　effective　strategy　is　proposed　to　regulate　the　oxygen　redox　chemistry　via　foreign　Fe　doping　and　its　induced　intrinsic　transition　metal　(TM)　doping　as　well　as　the　in　situ　constructed　spinel　surface　layer.　The　Fe　doping,　together　with　the　induced　intrinsic　TM　dual　doping,　can　stabilize　the　lattice　oxygen　in　the　bulk　due　to　the　formed　stronger　Fe-O　bond,　and　restrain　the　irreversible　TM　migration　and　then　the　undesirable　phase　transformation.　More　importantly,　thermodynamical　energy　barrier　of　oxygen　activation　is　dramatically　decreased　by　the　O　2p-Fe　3d　charge-transfer,　allowing　stable　oxygen　redox　activity.　And　the　pre-constructed　spinel　layer　can　effectively　stabilize　the　surface　lattice　oxygen　and　suppress　harmful　interfacial　side-reactions.　Such　a　simple　optimizing　method　make　the　modified　cathode　exhibit　a　high　specific　capacity　of　298　mAh　g(-1)　at　0.2　C,　outstanding　cycling　stability　with　a　superior　capacity　and　voltage　retentions　of　92.5%　and　90.8%,　respectively,　after　400　cycles　at　1　C.　This　study　provides　a　new　direction　for　developing　advanced　Li-ion　batteries.