Abstract: Based on the fundamental tenets of weather-ocean routing and factors influencing routing design, the characteristics of explosive cyclones and extra-tropical cyclones in winter over the North Pacific Ocean are analysis, and the features of wind fields and sea waves are also taken into account. The results show that routing design should consider climate conditions, weather feature analyses and short/mid-range weather forecasts, so that ships can make use of favorable wind and sea waves and adverse weather (strong wind, high wave etc.) to secure and improve economical prof its.