It is a convenient method to estimate design wave parameters utilizing the wind observation for wind wave factors in case there is no observed hydrologic data on the engineering site.Through two typical project cases in Ningbo-Zhoushan sea area,this paper calculates the wind wave factors by two principal means,i.e.national code method and Putian empirical method,and evaluates and compares the suitability and effectiveness of two formulas through combining three primary parameters into conditions (including fetch length,average depth and design wind speed),which can be used for reference in the engineering design.