Fuzzy　control　is　based　on　fuzzy　control　rules,　provided　by　experts,　to　control　complex　systems.　The　fuzzy　control　rules　describe　rudely　the　relation　between　input　and　output　of　controller.　So　Fuzzy　controller　is　in　essence　a　piecewise　approximator.　As　a　result,　fuzzy　control　has　two　shortcomings　in　the　process　of　controlling　some　practical　complex　systems.　One　is　that　control　rules　will　increase　exponentially　with　the　creasing　of　the　number　of　inputs,　and　the　other　one　is　that　the　precision　of　control　system　is　not　high.　By　analyzing　thoroughly　the　essential　relation　between　two　input　variables　of　the　normal　two-dimensional　fuzzy　controller,　this　paper　proves　that　the　essential　relation　is　just　universal　combinatorial　relation　in　Universal　Logic.　So　the　simple　universal　combinatorial　operation　can　be　used　instead　of　complex　fuzzy　reasoning　process.　As　a　result,　a　flexible　logic　control　method　is　proposed　to　realize　the　accurate　control　for　complex　system.　Finally,　the　experimental　result　of　single　inverted-pendulum　physical　system　has　proved　the　correctness　and　effectiveness　of　the　control　method.