LCA　method　is　adopted　and　typical　building　materials　corporations　are　taken　as　research　object.　The　interrelated　data,　such　as　data　of　resource　consumption　and　waste　discharge　in　the　producing　process　of　building　materials,　including　cement,　glass,　ceramics　and　walling　material,　are　analyzed,　calculated　and　life　cycle　inventory　database　of　building　materials　is　build.　By　using　the　database　ASP.NET　and　SQL　server　are　used　to　develop　the　network　database,　which　includes　the　information　about　company,　project,　industry,　flowsheet　and　flow,　and　it　is　convenient　for　users　to　search　and　submit　life　cycle　inventory　online.　Generally　speaking,　it　has　two　advantages.　The　first　one　is　that　the　advantage　of　internet　can　be　used　to　eliminate　the　barriers　of　time　and　geographical　throughout　the　course　of　data　collection.　And　the　second　one　is　that　it　can　provide　effective　communication　on　LCA　data　for　LCA　research　institutions.