With the advent of the longevity era for the elderly, elderly care communities that meet the needs for high-quality care are being explored in practice. Promoting the sustainable development of such communities is a practical issue. Through literature research and case study, using organizational ecology theory, it is found that H retirement community, as a practitioner of high-quality elderly care community, adopts cross-industry integrated investment construction and precise services based on individual needs in its investment operation mode. Its service system includes a high-standard service function system consisting of life care, medical care, spiritual comfort, culture and entertainment; a high-configuration service environment system built by elderly service facilities and a cultural community environment; a high-efficiency service support system built by professional nursing staff, improved property management and intelligent technology. They have brought the benchmark effect for high-quality old-age community investment construction and service operation. In view of the challenges of policy change, long payback period and insufficient demand, this paper puts forward some countermeasures.