To　avoid　the　performance　degeneration　caused　by　model　approximation　used　in　indirect　reduced　controller　design　methods,　motivated　by　the　static　output　feedback　controller　design　methods,　given　order　optimal　dynamical　output　controller　design　methods　are　discussed.　An　optimal　reduced　order　state　observer　is　obtained　by　using　system　decomposition.　The　optimal　feedback　gain　matrix　could　be　obtained　by　solving　a　static　output　feedback　controller　problem.　The　parameterized　mixed　H-two/H-infinity　controller　was　given　by　two　Riccati　equations　and　a　Lyapunov　equation.　An　example　was　offered　to　illustrate　the　design　method.