Internet　auction　is　not　only　an　integral　part　of　Electronic　Commerce　but　is　also　becoming　a　promising　field　for　applying　autonomous　agents　and　multi-agent　system　(MAS)　technologies.　And　auction,　as　an　efficient　resource　allocation　method,　has　an　important　role　in　MAS　problems　and　as　such　is　receiving　increasing　attention　from　scholars.　This　paper　suggests　a　protocol　(VAMA)　and　strategies　for　multi-attribute　auction.　Some　useful　properties　such　as　strategy-proof　are　also　proven.　This　paper　also　includes　an　analysis　of　the　strategy　of　the　buyer,　and　gives　a　decentralized　mechanism　for　VAMA　implementation　as　well　as　discussing　some　questions　about　VAMA.　Finally,　this　protocol　is　compared　with　existing　ones,　improving　on　the　work　of　Esther　David　etc.