The invention relates to an organic light-emitting display device. In the organic light-emitting display device, the cathode is arranged on a substrate; the organic light-emitting layer comprises a blue light material layer and a second light material layer partially shielding the blue light material layer; the second light material layer has a first area and a second area; the organic light-emitting display device also comprises a light conversion layer which is arranged oppositely to the first area and is used for converting second light emitted from the first area to third light to be emitted; the second light is selected from one kind from green light and red light; and the third light is selected from the other kind from green light and red light. According to the organic light-emitting display device, an open mask plate is only needed for forming the blue light material layer, a mask plate which is not precise enough is only needed for forming the second light material layer, thelight conversion layer can not use a mask plate due to self nature, and the use number of precise mask plates can thus be reduced. The invention also discloses a display device.