The　structure　of　defects　and　their　elemental　distributions　is　the　decisive　factor　to　metal＇s　mechanical　properties.　The　gamma/gamma　＇　structure　Co-Al-W-based　superalloy　is　a　potential　replicable　alloy　to　Ni-based　superalloys　that　have　been　used　for　a　long　time.　Revealing　the　microstructure　of　a　defect　induced　by　high-temperature　crept　provides　direct　clues　for　the　alloy　development.　Our　work　revealed　the　high-resolution,　high-angle　annular　dark　field　images　and　corresponding　elemental　distributions　on　crept　defects.　Defects　in　the　gamma　phase　mainly　contain　dislocation　networks,　while　the　gamma　＇　phase　contains　lots　of　stacking　faults　and　anti-phase　boundaries.　The　results　indicate　that　dislocation　networks　and　stacking　faults　contain　more　weight　elements　than　the　base　gamma　＇　phase,　while　anti-phase　boundaries　contain　more　light　elements.　Disclosing　atomic　structure　and　its　elemental　distributions　gives　direct　evidence　for　alloy　design　and　further　high-temperature　mechanical　improvement.