In the post-COVID-19 era of green economic recovery, this paper analyses the elderly care environment of cities in the Yangtze River Delta (YRD) region and investigates the future development direction of the elderly care industry based on comparative advantages and resource endowment. Firstly, an evaluation index system of the elderly care environment is constructed, then the entropy weight method is used to calculate the weight, and finally the comprehensive evaluation index of the elderly care environment in each city is obtained by weighted calculation. The development directions of the elderly care industry for each city in the YRD region are proposed based on the results. The study shows that the suitable development direction of the elderly care industry differs among cities. Cities suitable for residential elderly care are mainly distributed in the central and western regions, cities fit for the leisure and tourism of elderly care are mainly located in the southeast, and cities suitable for the treatment and rehabilitation of elderly care are mainly provincial capitals and cities with better economic development levels. Additionally, Wenzhou City in Zhejiang Province is eligible for the development of a comprehensive elderly care industry.