The　project　of　developing　software　is　a　comprehensive　multiple　objective　system.　In　view　of　the　characteristic　of　software　project　development　process,　this　article　uses　the　three　basic　factors-cost,　schedule　and　quality　of　the　software　project　development　as　the　multi-attribute　variable,　establishes　an　integrated　optimization　model　of　software　project　development　process　based　on　fuzzy　multi-attribute　theory.　For　the　tradeoff　optimization　problem　of　these　three　basic　factors,　the　model　presents　a　dynamic　multi-objective　optimization　solution.　Using　the　genetic　algorithm　we　can　obtain　the　most　satisfied　results.　Finally　we　give　an　example　to　verify　the　model＇s　feasibility　and　effectiveness.　The　efficiency　of　the　model　is　quite　high,　and　the　results　accord　with　the　practice.