In snowy and cold cities, especially in Hokkaido, the urban design should be considered to its original climate situation cold wind and much snow. Author targeted Wakkanai station renewal project and developed new urban design process that designed with planning process and environmental assessment together. This new design process was successful that the feedback of eight environmental assessments influenced to the urban and building design. On the design process, the weak points of making snowdrifts and blowing strong wind were cleared. The final station design will be prevented from snow and wind impacts on the new urban design process.