Abstract: Aiming at ventilation requirements under high temperature and high humidity in summer and the needs for wind sheltering in chilly winters in the Bohai Rim region, based on the typical meteorological year parameters in the JGJ/T 346-2014 Building Energy Conservation Meteorological Parameter Standards, a statistical analysis of wind directions, wind frequencies and wind speed data for 23 cities, based on the old specification of HJ 2.2-2008, a quantitative calculation method of dominant wind directions was proposed. Based on the statistical results of dominant wind directions, wind frequencies, and wind speeds, taking winter sheltering and summer ventilation into comprehensive consideration, the concepts of ventilation coefficients and sheltering coefficients were proposed, and rose maps of city ventilation or sheltering were drawn to explore the favorable ventilation directions and adverse sheltering directions in different classification areas.