An　offer　is　accepted　or　rejected　based　on　the　utility　function　in　the　traditional　automatic　negotiation.　Acceptability　based　on　the　fuzzy　set　theory　and　the　membership　function　is　used　to　evaluate　offers.　Since　different　issues　have　different　effect　on　negotiators,　the　combined　concession　in　the　multi-issue　negotiation,　Bayesian　learning　mechanism　and　genetic　algorithm　are　adopted　to　update　its　beliefs　about　incomplete　information.　The　fuzzy　negotiation　model　is　a　more　practical　than　the　traditional　negotiation　model.