Design load cases determines the external loads and operating environment of wind turbine. Due to existing design guidelines or standards don’t consider the impact of Tropical Cyclones（referred to as TC）or Typhoon，when wind turbine operating in TC areas，the destruction of the risk increases，manufacturing and maintenance costs increase. Using TC observed data，turbulence intensity，gust characteristics and wind direction characteristics were studied in TC landing process，a adaptive design method of wind turbine to typhoon conditions is suggested，including typhoon characteristics，typhoon design conditions，structural design，control strategy，operation and maintenance strategy. The typhoon design load is simulated based on the suggested method；The result shows that the suggested method of offshore wind turbine anti-typhoon design has a better economy and safety.