Water saving has been the focus of a great deal of research, so direct air-cooled power plants with remarkable water saving performance have been popularized in the place with water shortage and abundant coal production.In this paper, a mathematic model of a 2×600 MW direct air-cooled power plant was built.On the basis of the operating performance of fans under windless conditions, considering the effects of workshops in the air-cooled plants and the symmetry of wind directions, we selected 5 wind directions from β=0° to β=180° (0°, 45°, 90°, 135°, 180°)and the range of certain wind speeds(2-10 m/s).The operating performance of fans was investigated under the above selected conditions.The change laws of the flow rate values of fans and the heat exchange rate values of heat exchangers under above different wind directions and wind speeds conditions were researched.Results show that the workshops have positive effects on adjacent fans under windless condition.When the wind direction β is90°, the fans flow rates and the heat exchange rates of condensers reach the maximum due to the facts that the amount of windward side fans is small and the workshops have little influence on fans.When the wind direction β is 180°, the ambient wind is blocked by the workshops leading to poor performance of condensers.