An electronic device and an object reproduce method are provided. In the photographing mode, the camera module is used to capture and store at least one background image within the photographing range and sense whether an external object appears within the photographing range. When the external object is sensed within the photographing range a processor is used to reproduce the external object as a virtual object image. Then, in the projection mode, an image projection module is used to project the virtual object image onto a work plane, and the user is allowed to interact with the virtual object image on the work plane.