This article presents an improved overlay method based on the overlay method of environmental evaluation, in order to realize the ecological design. Taking the water ecological design of NAME Park as an example, the article discusses four maps which the authors drew by using the overlay method: aquatic ecological function map, pollution and nutrient matrix analysis map, water landscape vision map and water ecological system map. Finally, the article points out that using the overlay method can directly achieve the visualization of ecological design.%在环境评价叠图法基础上提出了一种改进型叠图法，以实现生态设计。并以NAME公园水域的水生态设计为案例，采用该方法绘制了4张叠图，分别是水生态功能定位图、污染与营养基质分析图、水人文景观愿景绘制图、水生态系统设计图，直接简洁地完成了系统可视化的生态设计。
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