The present invention provides a functional beam projector. A conventional interior decoration product requires much space and much time when being installed. Moreover, after installed once, replacement is difficult such that much time and much money is required. To resolve this problem, the functional beam projector according to the present invention allows easy replacement for a person who wants to change interior decoration frequently and can be used as a driver′s number of a vehicle, public relations and advertisement. The functional beam projector comprises a main body, an input part, an output part, a control part. The main body has a lens and a light formed thereon. The input part is formed on a side surface of the main body to allow a universal serial bus (USB) and a USB card to be inserted. The output part allows input data on the USB and the USB card to be displayed. The control part controls the input data. The present invention is a very useful technique to allow a drawing, a picture and a graphic character to be shown on a glass surface.;COPYRIGHT KIPO 2016
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