Nowadays,　integrated　energy　systems　(IESs)　have　become　an　influential　approach　in　the　backdrop　of　energy　interconnection　and　low-carbon　energy　concepts.　This　paper　proposes　a　multi-energy　trading　strategy　for　IESs　that　simultaneously　considers　carbon　emissions　transaction　(CET)　and　tradable　green　certificate　(TGC)　to　promote　low-carbon　energy　development　further.　Firstly,　a　multi-stage　robust　optimization　method　addresses　uncertainties　in　renewable　energy,　loads,　and　electricity　prices　to　ensure　stable　operation　of　the　IES.　Secondly,　a　trading　mechanism　is　proposed　by　integrating　CET　with　TGC　to　establish　a　coupled　electricity-heat-carbon-　green　certificate　market.　Accordingly,　a　cooperative　game　framework　among　multiple　IESs　is　modeled,　which　considers　different　contribution　allocations　while　promoting　the　economic　and　low-carbon　operation　of　IES.　Finally,　the　model　is　solved　using　the　alternating　direction　method　of　multipliers　(ADMM)　algorithm.　The　proposed　strategy＇s　effectiveness　in　improving　the　low-carbon　economic　operation　of　IESs　has　been　proved　through　simulation　studies.