A washing system comprising: a first apparatus; a second apparatus disposed above the first apparatus; and one control panel, disposed at a front of the second apparatus and higher than the first apparatus, including a first user interface provided in a lower area and a second user interface provided in an upper area above the lower area, wherein the first user interface, located closer to a first door of the first apparatus than the second user interface, is configured to receive a first user input associated with the first apparatus, and the first user interface includes: a first power button configured to receive a user input for turning on or off power of the first apparatus, a washing course button configured to receive a user input for selecting a washing course, and a first start button configured to receive a user input for starting or stopping operation of the first apparatus, and wherein the second user interface, located closer to a second door of the second apparatus than the first user interface, is configured to receive a second user input associated with the second apparatus, and the second user interface includes: a second power button configured to receive a user input for turning on or off power of the second apparatus, a drying course button configured to receive a user input for selecting a drying course, and a second start button configured to receive a user input for starting or stopping operation of the second apparatus, wherein the washing system is configured such that: in response to the first user input associated with the first apparatus not being received for a predetermined time, the first user interface is turned off, independent of whether the second user interface is in an activation mode; in response to the second user input associated with the second apparatus not being received for the predetermined time, the second user interface is turned off, independent of whether the first user interface is in the activation mode. a first apparatus; a second apparatus disposed above the first apparatus; and one control panel, disposed at a front of the second apparatus and higher than the first apparatus, including a first user interface provided in a lower area and a second user interface provided in an upper area above the lower area, wherein the first user interface, located closer to a first door of the first apparatus than the second user interface, is configured to receive a first user input associated with the first apparatus, and the first user interface includes: a first power button configured to receive a user input for turning on or off power of the first apparatus, a washing course button configured to receive a user input for selecting a washing course, and a first start button configured to receive a user input for starting or stopping operation of the first apparatus, and a first power button configured to receive a user input for turning on or off power of the first apparatus, a washing course button configured to receive a user input for selecting a washing course, and a first start button configured to receive a user input for starting or stopping operation of the first apparatus, and wherein the second user interface, located closer to a second door of the second apparatus than the first user interface, is configured to receive a second user input associated with the second apparatus, and the second user interface includes: a second power button configured to receive a user input for turning on or off power of the second apparatus, a drying course button configured to receive a user input for selecting a drying course, and a second start button configured to receive a user input for starting or stopping operation of the second apparatus, a second power button configured to receive a user input for turning on or off power of the second apparatus, a drying course button configured to receive a user input for selecting a drying course, and a second start button configured to receive a user input for starting or stopping operation of the second apparatus, wherein the washing system is configured such that: in response to the first user input associated with the first apparatus not being received for a predetermined time, the first user interface is turned off, independent of whether the second user interface is in an activation mode; in response to the second user input associated with the second apparatus not being received for the predetermined time, the second user interface is turned off, independent of whether the first user interface is in the activation mode. in response to the first user input associated with the first apparatus not being received for a predetermined time, the first user interface is turned off, independent of whether the second user interface is in an activation mode; in response to the second user input associated with the second apparatus not being received for the predetermined time, the second user interface is turned off, independent of whether the first user interface is in the activation mode.