With the increasing frequency of extreme weather events, the demand for water, energy, and food will continue to rise. However, after analyzing the current literature on water, energy, and food collection systems, respectively, it can be found that current resource collection systems don’t have the ability to respond to extreme weather. Even if current resource collection systems are expanded or the number of existing resource collection systems increases, such passive resource-collecting systems will struggle to cope with resource demands in extreme weather. Nevertheless, an integrated system utilizing air film as the primary structural component devised in this paper not only offers the potential to collect rainwater, renewable energy, and food, but also significantly enhances the yield of resources through a symbiotic relationship between them. With the characteristics of air film, the integrated system is designed with functions of mobility, expansion and contraction, transmission, technological compatibility, and environmental friendliness. The above functions make the integrated system able to integrate rainwater, renewable energy, and food production systems into a single system. From the discussion, it is evident that the new functionality enhances the flexibility of resource collection within the integrated system, facilitates the compatibility of disparate resource collection techniques, and fosters the sustainability of resources through mutual support. It can be concluded that the designed integrated system is capable of meeting the demand for water, energy, and food in extreme weather. The flexibility of the integrated system is such that passive resource collection can be changed to active search and acquisition of resources. The mutual support among rainwater, renewable energy, food, and recycling of wastes serves to strengthen the adaptive capacity of the integrated system to the changing environment, which is of great significance for socioeconomic sustenance in extreme weather.