We will conduct a prospective, single-center observational study involving 60 adult T2D patients recruited from Chang Gung Memorial Hospital. Participants will be randomly allocated to either a CGM group or a control group receiving standard care. The intervention group will utilize mobile apps for medication tracking, and a remote communication platform. All participants will collect clinical data-including HbA1c, Time in Range (TIR), insulin use-at baseline and 12 weeks. Patient adherence and satisfaction with CGM will also be assessed.