B2T　electronic　commerce　model　is　Internet-based　group-buying　model.　Consumers　with　the　same　demand　may　accumulate　rapidly　through　the　Internet.　B2T　electronic　commerce　model　provides　accurate　demand　to　mass　customization　which　is　the　premise　of　the　implementation　of　the　custom　value;　from　another　point　of　view,　the　scale　effect　bought　by　group-buying　reduces　the　cost　of　mass　customization.　This　paper　mainly　from　custom　value　and　custom　cost　these　two　aspects　to　conduct　the　research　of　the　influence　of　B2T　electronic　commerce　model.　©　2011　IEEE.