A media wall comprising: a frame structure comprising a mounting cell; an electronic appliance disposed in the mounting cell; a drive roller disposed at a side of the mounting cell; a screen wound around the drive roller, the screen comprising a first region positioned in a front side of the electronic appliance and a second region positioned outside of the front side of the electronic appliance; a motor configured to provide rotational force to the drive roller to vary an area of the first region of the screen; and characterized in that the media wall further comprises: a first screen plate positioned at a lower end of the first region of the screen; and a protruding frame movable in the mounting cell back-and-forth in a thickness direction of the media wall, wherein the media wall has a first state in which the screen is configured to have an area of the first region to cover the electronic appliance, and the protruding frame is configured to move forward to contact the first region of the screen, wherein the media wall has a second state in which the screen is configured to have another area of the first region to expose the electronic appliance, and the protruding frame is configured to move rearward and be spaced apart from the screen, and wherein the protruding frame is configured to move back in the thickness direction a distance greater than or equal to a thickness of the first screen plate when the media wall switches from the first state to the second state. a frame structure comprising a mounting cell; an electronic appliance disposed in the mounting cell; a drive roller disposed at a side of the mounting cell; a screen wound around the drive roller, the screen comprising a first region positioned in a front side of the electronic appliance and a second region positioned outside of the front side of the electronic appliance; a motor configured to provide rotational force to the drive roller to vary an area of the first region of the screen; and characterized in that the media wall further comprises: a first screen plate positioned at a lower end of the first region of the screen; and a protruding frame movable in the mounting cell back-and-forth in a thickness direction of the media wall, wherein the media wall has a first state in which the screen is configured to have an area of the first region to cover the electronic appliance, and the protruding frame is configured to move forward to contact the first region of the screen, wherein the media wall has a second state in which the screen is configured to have another area of the first region to expose the electronic appliance, and the protruding frame is configured to move rearward and be spaced apart from the screen, and wherein the protruding frame is configured to move back in the thickness direction a distance greater than or equal to a thickness of the first screen plate when the media wall switches from the first state to the second state. a first screen plate positioned at a lower end of the first region of the screen; and a protruding frame movable in the mounting cell back-and-forth in a thickness direction of the media wall, wherein the media wall has a first state in which the screen is configured to have an area of the first region to cover the electronic appliance, and the protruding frame is configured to move forward to contact the first region of the screen, wherein the media wall has a second state in which the screen is configured to have another area of the first region to expose the electronic appliance, and the protruding frame is configured to move rearward and be spaced apart from the screen, and wherein the protruding frame is configured to move back in the thickness direction a distance greater than or equal to a thickness of the first screen plate when the media wall switches from the first state to the second state.