A controlling method of a laundry machine comprising: setting a preset ambient temperature or water temperature to over 55°C, a preset mite-killing duration and a preset washing time (t 1), wherein the preset washing time (t 1) is longer than the preset mite-killing duration; washing laundry, the washing laundry including: supplying wash water to a tub of the laundry machine for washing laundry; performing a mite-killing step to expose laundry to a mite-killing temperature at 55° or above for or over the preset mite killing duration, the mite-killing step comprising: driving a drum of the tub and supplying steam into the tub, increasing an ambient temperature or water temperature inside the tub to reach the preset ambient temperature or water temperature; and when the ambient temperature or water temperature reaches the mite-killing temperature perform the mite-killing for the preset mite-killing duration by varying the time of supplying of steam and continue driving the drum until the preset washing time is reached after the supply of steam is complete, rinsing the laundry after the washing laundry; and spin-drying the rinsed laundry, wherein the steps are performed in the order listed. setting a preset ambient temperature or water temperature to over 55°C, a preset mite-killing duration and a preset washing time (t 1), wherein the preset washing time (t 1) is longer than the preset mite-killing duration; washing laundry, the washing laundry including: supplying wash water to a tub of the laundry machine for washing laundry; performing a mite-killing step to expose laundry to a mite-killing temperature at 55° or above for or over the preset mite killing duration, the mite-killing step comprising: driving a drum of the tub and supplying steam into the tub, increasing an ambient temperature or water temperature inside the tub to reach the preset ambient temperature or water temperature; and when the ambient temperature or water temperature reaches the mite-killing temperature perform the mite-killing for the preset mite-killing duration by varying the time of supplying of steam and continue driving the drum until the preset washing time is reached after the supply of steam is complete, rinsing the laundry after the washing laundry; and spin-drying the rinsed laundry, wherein the steps are performed in the order listed. supplying wash water to a tub of the laundry machine for washing laundry; performing a mite-killing step to expose laundry to a mite-killing temperature at 55° or above for or over the preset mite killing duration, the mite-killing step comprising: driving a drum of the tub and supplying steam into the tub, increasing an ambient temperature or water temperature inside the tub to reach the preset ambient temperature or water temperature; and when the ambient temperature or water temperature reaches the mite-killing temperature perform the mite-killing for the preset mite-killing duration by varying the time of supplying of steam and continue driving the drum until the preset washing time is reached after the supply of steam is complete, driving a drum of the tub and supplying steam into the tub, increasing an ambient temperature or water temperature inside the tub to reach the preset ambient temperature or water temperature; and when the ambient temperature or water temperature reaches the mite-killing temperature perform the mite-killing for the preset mite-killing duration by varying the time of supplying of steam and continue driving the drum until the preset washing time is reached after the supply of steam is complete, rinsing the laundry after the washing laundry; and spin-drying the rinsed laundry, wherein the steps are performed in the order listed.