y school,the teachers conducted acomprehensive analysis oftheassessment indicators. Inthethirdchapter ofobject-oriented analysisand designtechniques,Web development technologies anddevelopment tools,Web database access technologies aleanalyzedand studied. In thefourthchapter theuse ofUML modeling tools toconduct adetailed systems analysis anddesign,and buildsystemmodel.System design includedatabase design,software process design andthedesign ofdynamic pages,etc.In additionto n suggest forthesupport ofthehardware environment ofthesystem isrunning. Inthefifthchapter,according totherelevantsystem model isgiven ateacher assessment systemdesign andinterfaceofseveralmainmodules. Finally,Chapter sixth onthewatersupplysystem issummarized. Key words:Teacher Assessment;Web-based;Object-Oriented;.NET