It is prevalent that flight control system design using redundancy concept to improve mission reliability.The efficiency of redundancy components are mainly decided by redundancy management strategies and methods.Based on Boeing 777 aircraft High lift control system architecture, redundancy management methods was studied inthis paper by the combination of online monitor and signal voting. The wire disposing methods, hardware design methods and software design methods are fully considered in the process of designing redundancy management methods, as a result, not only the flap/ slat electronic unit hardware but also its software are simplified, the system reliability is also improved. The design concept and methods use in this paper can be importance reference to similar system design.