Aging of population, networked and intelligent life are the dual-track process of urban community development in recent years, which prompts us to think about how to build mediated living environment and interactive service situation for the urban elderly. Based on analyzing the new forms of situation construction in internet era， and the composition of community media service situation in community interaction space, the construction principle and the network model of community media interaction situation for home-based care were proposed, and the implementation strategies based on community service organizations were demonstrated from five aspects of information dissemination, activity support, communication promotion, mutual assistance and care provision.