The digital-intelligent transformation of inclusive elderly care services constitutes an institutional change process jointly driven by exogenous technological opportunities and endogenous governance contradictions. Based on a longitudinal case study of City W, this paper partitions its transformation trajectory into three stages, namely, informatization foundation, digital integration, and intelligent integration, and yields four principal findings. First, as the transformation is driven by exogenous technological opportunities and endogenous governance contradictions, the focal contradictions evolve from the information black box to data silos, and ultimately to the service efficacy gap. Second, the transformation trajectory is co-shaped by the power relations and compatibility among five institutional logics—state, bureaucratic, market, community, and digital-intelligent—whose interactions progress through three escalating modes: crowding-out-and-absorption, competition, and integration. Third, actor strategies shift systematically with the configuration of institutional logics. Under a highly centralized bureaucratic logic that crowds out competing logics, actors converge on dependency strategies, trading compliance for legitimacy and resources; as multiple logics deepen their interaction and actors confront legitimacy criteria rooted in divergent logics, strategies diversify into selective, absorptive, and coalitional forms. Additionally, older adults undergo a role transition from passive data objects to substantive governance participants. Fourth, the institutional outputs of each stage feed back as new sources of contradiction, propelling institutional change in the subsequent stage. The current intelligent-integration stage, therefore, marks not an endpoint but the onset of renewed institutional adaptation, confronting emergent challenges of data ownership, algorithmic accountability, and ecosystem monopolization. Advancing the transformation hinges on identifying the dominant modality of logic conflict at each stage and designing stage-specific intervention points and coordinating instruments.