A switchable organic electro-luminescence display circuit includes a plurality of scan lines, a plurality of data lines, a plurality of first organic electro-luminescence devices, a plurality of second organic electro-luminescence devices, a display mode switching line, and at least one display mode switching transistor. Each of the first organic electro-luminescence devices is electrically connected to a scan line and a data line correspondingly, and coupled between a first voltage source and a second voltage source. Each of the second organic electro-luminescence devices is electrically connected to a scan line and a data line correspondingly, and coupled to the first voltage source. A gate electrode of the display mode switching transistor is electrically connected to the display mode switching line. A source electrode and a drain electrode of the display mode switching transistor are electrically connected to the second voltage source and the second organic electro-luminescence devices respectively.