A laundry processing apparatus comprising: a drying machine; a washing machine disposed under the drying machine; a control panel including: a washer selecting button configured to receive an input for selecting the washing machine, a first start/pause button configured to receive an input for starting or pausing an operation of the washing machine, a plurality of setting buttons (261, 262, 263) configured to receive inputs for modifying a setting of the operation of the washing machine, wherein a plurality of light emitting elements are included in the plurality of setting buttons, a dryer selecting button configured to receive an input for selecting the drying machine, a second start/pause button configured to receive an input for starting or pausing an operation of the drying machine, and a display configured to display operation information of the washing machine or operation information of the drying machine; characterized in, a controller configured to: control the plurality of light emitting elements to emit light so that, on the plurality of setting buttons (261, 262, 263), text or symbol indicating the setting of the operation of the washing machine is displayed in response to the input received through the washer selecting button, and cause the drying machine to pause operation of the drying machine in response to the input received through the second start/pause button while displaying, on the plurality of setting buttons (261, 262, 263), the text or symbol indicating the setting of the operation of the washing machine. a drying machine; a washing machine disposed under the drying machine; a control panel including: a washer selecting button configured to receive an input for selecting the washing machine, a first start/pause button configured to receive an input for starting or pausing an operation of the washing machine, a plurality of setting buttons (261, 262, 263) configured to receive inputs for modifying a setting of the operation of the washing machine, wherein a plurality of light emitting elements are included in the plurality of setting buttons, a dryer selecting button configured to receive an input for selecting the drying machine, a second start/pause button configured to receive an input for starting or pausing an operation of the drying machine, and a display configured to display operation information of the washing machine or operation information of the drying machine; a washer selecting button configured to receive an input for selecting the washing machine, a first start/pause button configured to receive an input for starting or pausing an operation of the washing machine, a plurality of setting buttons (261, 262, 263) configured to receive inputs for modifying a setting of the operation of the washing machine, wherein a plurality of light emitting elements are included in the plurality of setting buttons, a dryer selecting button configured to receive an input for selecting the drying machine, a second start/pause button configured to receive an input for starting or pausing an operation of the drying machine, and a display configured to display operation information of the washing machine or operation information of the drying machine; characterized in, a controller configured to: control the plurality of light emitting elements to emit light so that, on the plurality of setting buttons (261, 262, 263), text or symbol indicating the setting of the operation of the washing machine is displayed in response to the input received through the washer selecting button, and cause the drying machine to pause operation of the drying machine in response to the input received through the second start/pause button while displaying, on the plurality of setting buttons (261, 262, 263), the text or symbol indicating the setting of the operation of the washing machine. control the plurality of light emitting elements to emit light so that, on the plurality of setting buttons (261, 262, 263), text or symbol indicating the setting of the operation of the washing machine is displayed in response to the input received through the washer selecting button, and cause the drying machine to pause operation of the drying machine in response to the input received through the second start/pause button while displaying, on the plurality of setting buttons (261, 262, 263), the text or symbol indicating the setting of the operation of the washing machine.