Abstract: 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.