In　order　to　protect　the　service　management　information,　a　fine-grained　access　control　model　for　service　management　information　is　proposed,　through　which,　the　operations　of　service　manager　accessing　service　management　information　can　be　controlled.　A　formalized　description　of　subject,　object,　and　authorization　rules　are　given,　and　an　authorization　conflict　resolution　strategy　is　proposed.　Moreover,　a　tree　labeling　algorithm　for　a　XML　document　is　designed,　which　states　whether　an　element/attribute　(or　set　of　them)　in　the　XML　document　can　(or　cannot)　be　accessed　by　the　service　manager.　After　that,　four　operations　on　the　XML　document　of　the　fine-grained　access　control　model　in　the　service　management　system　are　described　in　detail.　The　access　control　model　of　protecting　service　management　information　allows　the　definition　of　access　restrictions　directly　on　the　element　or　attribute　of　the　XML　documents.