A power adapting device has a connecting seat, at least two conductive strips, and an adapter. The connecting seat has a mounting portion with two slots. The at least two conductive strips are mounted in the connecting seat. Each of the at least two conductive strips has a positioning sheet, a conductive sheet obliquely protruding upward from the positioning sheet, an arced sheet protruding down from the positioning sheet, and an engaging sheet protruding down from the arced sheet. The engaging sheet has a semispherical contact. The adapter is electrically connected to the conductive sheets of the at least two conductive strips. With different power adapting devices of different standards using in cooperation with a charger, the charger can comply with different electrical socket standards via the power adapting devices.