With　the　wide　application　of　synchronized　phase　measurement　unit(PMU)　in　power　system,　the　wide-area　measurement　system(WAMS)　has　enabled　the　use　of　a　combination　of　measured　information　from　remote　location　for　global　control　purpose.　However,　the　impact　of　time　delays　introduced　by　remote　information＇s　transmission　in　WAMS　has　to　be　considered,　and　the　closed-loop　power　systems　need　be　modeled　as　time-delay　nonlinear　systems.　Moreover,　the　wide-　area　information　is　incomplete　when　not　all　generators　in　power　system　are　equipped　with　the　PMU.　In　order　to　eliminate　the　effects　of　power　system　model＇s　nonlinearity　and　wide-area　information＇s　uncertainty　including　time　delays　and　incomplete-　ness,　a　novel　approach　based　on　inverse　system　algorithm　and　linear　matrix　inequatity(LMI)　technique　is　proposed　to　design　a　nonlinear　robust　integrated　controller.　Digital　simulation　demonstrates　that　the　four-　machine　system　under　the　nonlinear　robust　integrated　control　has　less　settling　time,　swing　times,　oscillatory　peak　value　and　more　critical　clear　time　and　better　voltage　stability　performance　for　various　time　delays　of　remote　incomplete　measured　information　than　that　under　PID　control　or　nonlinear　decentralized　integrated　control.