A laundry treatment apparatus includes a tub that stores wash water; a drum rotatably disposed in the tub; a heater that heats wash water in the tub; a temperature sensor that senses a temperature of wash water; an output unit that displays at least one operation setting of the laundry treatment apparatus; and a controller configured to: determine an initial operation time based on the at least one operation setting; output the initial operation time through the output unit; determine an operation time based on (i) the temperature of wash water sensed by the temperature sensor during a supply of water to the tub and (ii) a level of wash water supplied to the tub; and output the operation time through the output unit.