China’s unique family planning policy has led to the emergence of “421” and “422” family structure, which makes the proportion of the elderly population continue to increase, and the seriousness of the pension problem continue to intensify. At the same time, the problems in early childhood education brought about by the phenomenon of few-generating of family structure cannot be underestimated. But paradoxically, welfare facilities of old-age care and?child-care?in?the?community?are?extremely?deficient,?and?the?use?of?existing?facilities?is worrying. This paper focuses on the problems of old-age care and child-care existing in “421” and “422” family structure emerging from the domestic fertility policy, and puts forward the design idea of welfare facilities of the integrated welfare facilities for elderly and children in the community.