The　electronic　toll　collection　(ETC)　system　is　an　importation　subsystem　in　the　intelligent　transportation　system　(ITS).　It　can　continuously　record　the　time　of　vehicles　entering　or　departuring　from　the　certain　toll　station.　Based　on　the　charge　transaction　data　of　ETC　system,　this　paper　analyzed　the　original　data　and　determined　the　data　processing　flow　of　ETC　Data.　Then,　it　proposed　the　travel　speed　calculation　model　of　freeway,　the　traffic　flow　distribution　analysis　method,　the　information　mining　techniques　of　OD　distribution,　vehicle　type　proportion　in　different　toll　gate,　and　so　on.　The　research　finally　took　the　ETC　data　of　Beijing　city　in　2008　as　an　example,　and　carried　a　case　analysis.　The　result　indicated　that　the　data　processing　and　the　index　extraction　techniques　proposed　in　this　research　can　accurately　gain　the　information　which　is　necessary　in　the　freeway　operation　and　management.　These　provide　effective　decision-making　support　for　the　freeway　travelers＇　information　service　and　the　highway　traffic　operation　and　the　plan.　©　2010,　China　Association　for　Science　and　Technology.　Electronic　version　published　by　Elsevier　Limited.　All　rights　reserved.