In order to deal with the risks of birds caused by the rapid expansion and increase of light pollution and noise pollution in urban ecological patches, this paper discusses a whole chain research method, in which the ecological risk thresholds of light or noise to birds at the micro-level and the distribution of light or noise pollution at the macro-level are combined to realize ecological risk assessment. Following the method, the paper firstly explored the risk thresholds of light or noise pollution to birds. Specifically, it obtained the light risk thresholds to Eurasian Siskin and Chestnut Bunting as well as the noise risk threshold to Thrush, in which process it provided a technique for transforming the risk thresholds of light intensity drawn from laboratory studies to those in outdoor light environment with compound spectral compositions. Then we obtained macroscopic nighttime artificial light and sound field distribution data, in which light distribution data were obtained through Luojia 1-01 and Jilin 1-7B nighttime remote sensing images, while sound field distribution data were acquired through software simulation, field measurement and calibration, ArcGIS attribute assignment, etc. Later we conducted ecological risk assessment by integrating microscopic risk thresholds of light and noise to birds with macroscopic light and sound field distribution data. In particular, it took a typical urban ecological patch as a case study and analyzed the distribution characters of risks caused by local light and noise pollution. Finally, it established an ecological risk assessment platform and presented light and noise risks to birds with visualizations. The method of ecological risk assessment proposed in this paper can provide scientific and normative demonstration for research and techniques that support rapid assessment of ecological risks by light and noise pollution in large-scale urban areas.