E-procurement　is　an　effectual　purchase　mode.　XML-based　or　EDI-based　information　system　can＇t　support　the　real　time　and　dynamic　requirement　of　e-procurement.　The　SOA　may　realize　integration　of　the　application　procedure　crossing　platform　and　enables　the　information　to　be　sharing　in　real-time　between　the　related　application　procedures.　This　passage　takes　NH　group　for　example,　introduced　Web　services　identification　and　extraction　and　the　development　process　of　Web　services　©　2010　IEEE.