There has been an increasing incidence of pollen allergic diseases in cities around the world. As a fundamental unit of a city, community has an important impact on residents' health. Therefore, pollen-allergy risk assessment at community scale is significant to reduce pollen-allergy symptoms and improve health among residents. Therefore, this study reviewed relevant factors affecting pollen-allergy risk in communities from the perspectives of pollen-producing plant ontogeny and of the spatial environment affecting pollen dispersal. It further sorted out the assessment methods of pollen-allergy risk. Research findings indicated that the existing studies did not apply pollen-allergy risk assessment methods at mesoscale, especially urban communities, while focused on the microscale (i.e., plant scale) and the macroscale (i.e., city scale). In addition, in terms of factors affecting the risk of pollen-allergy, most existing methods were concerned with plant factors, such as the height and crown width of a plant, and few of them considered the environmental factors, including wind environment, temperature, humidity, etc. Finally, there were various architecture landscapes inside a community. Thus, understanding the interaction between plants and built environment was essential for pollen-allergy risk assessment at community scale. Based on these findings, we provided suggestions to develop pollen-allergy risk assessment at community scale. Firstly, we should develop a standardized dataset providing information about common plants in communities, and establish a pollen-allergy risk assessment method at community scale based on the evaluation of plants, community built environment, and clinical prevalence of pollen-allergy diseases. Secondly, we should build community three-dimension models to simulate pollen distribution and dispersal with visualization techniques, which contributes to reducing the morbidity of pollen-induced allergic diseases and improving health status of urban residents.