Abstract: A portable electronic device with switchable interfaces is provided. The device comprises a body with a touch panel, and a plurality of panels which can be used alternatively. The body is disposed with a corresponding interface panel for displaying one of the plurality of user interfaces, thus an interface adaptable for users to operate can be provided depending on the requirements of the use situation. Moreover, the panel further comprises an identifying element for generating an identification signal when disposed in the body, such that the user interface can be switched and can display a state corresponding to the selected panel.