A method for measuring skin by an electronic device is provided. The method for measuring skin by the electronic device includes an operation of irradiating at least one light into skin to which a patch is adhered, an operation of detecting at least one reflected light on the basis of an amount of moisture in the skin, which is changed by physiologically active substances injected through the patch, corresponding to the irradiated light, an operation of generating patch adherence information indicating a skin adhesive state of the patch on the basis of the detection result of the at least one reflected light and an operation of providing the generated patch adherence information to an output unit or a communication unit.