Most　of　the　current　agent　systems　focus　on　single　issue,　such　as　price,　whereas　multi-issue　negotiation　is　very　essential　to　electronic　commerce.　In　the　multi-issue　model,　MA　UT　(Multi-attribute　Utility　Theory)　or　its　derived　theory　is　mainly　used　as　the　evaluation　method.　However,　the　application　of　this　theory　may　cause　deviation.　To　resolve　the　problem,　a　two　stage　negotiation　model　is　presented　in　this　paper.　In　the　first　stage,　the　negotiation　theory　is　used　to　negotiate　over　the　most　important　issue　or　the　issues　combination.　In　the　second　stage　we　reverse　auction　the　product　each　issue　at　one　time　according　to　the　issue　importance　from　the　smallest　to　the　most　important　using　the　adjusted　auction　theory.　©　2008　IEEE.