With　increasing　concerns　about　global　warming,　and　the　cement　plants　emitting　huge　CO2,　it　is　necessary　to　know　how　the　CO2　emits　and　how　much　the　CO2　emits　due　to　cement　manufacture　in　both　direct　and　indirect　ways.　A　precise　method　to　calculate　CO2　emissions　including　three　processes　was　established　in　this　paper　and　a　case　study　was　provided.　From　the　case　of　LQDX　plant,　we　can　see　the　amount　of　CO2　emissions　at　the　right　level.　The　summary　of　CO2　emissions　is　consisted　by　emissions　from　raw　materials,　fuels　and　electricity.　The　direct　CO2　emissions　are　0.822　ton　CO2　per　ton　clinker,　and　the　total　CO2　emissions　are　0.657　ton　CO2　per　ton　cement　in　this　study.　Therefore,　the　way　that　CO2　emissions　due　to　cement　manufacture　was　pictured　and　then　measured.　An　approach　provides　a　basic　framework　to　identify　various　situations　in　different　cement　plants　in　China　and　other　in　the　rest　of　the　world.　The　framework　would　be　useful　in　quantitatively　evaluating　CO2　emissions　for　government　to　know　precisely　CO2　emissions　in　cement　plants.