We　usually　decide　to　accept　or　reject　the　offer　based　on　the　utility　function　in　the　traditional　automatic　negotiation　of　E-commerce　so　that　we　reject　the　offers　whose　utility　is　lower　than　a　specified　value.　Here　we　evaluate　the　acceptability　based　on　the　fuzzy　set　theory　and　the　membership　function.　Since　different　issues　have　different　effect　on　the　negotiators,　we　state　the　combined　concession　in　the　multi-issue　negotiation　for　the　negotiators　and　negotiator　Agent　adopts　Bayesian　learning　mechanism　to　update　its　beliefs　about　incomplete　information.　We　put　forward　a　more　practical　negotiation　model　than　the　traditional　negotiation　model.　©2007　PICMET.