This case introduces that Yijia （Shanghai） elderly Service company has established a visual，quantifiable and feasible full-chain，full-cycle service mechanism of community home for the elderly with cognitive disorders at home in the community through the construction of a cognitive community “HAPPY” care model and the formulation of community home cognitive care norms based on the concept of “HAPPY” care. It provides professional support for the increment，enhancement and efficiency of the cognitive impairment at home in the community.