A control method of a laundry treatment apparatus comprising a first treatment device that has a first load unit and that is configured to treat laundry and a second treatment device that has a second load unit and that is configured to treat laundry, the control method comprising: executing a first cycle in the first treatment device by supplying electric power to the first load unit; while executing the first cycle in the first treatment device, executing a second cycle in the second treatment device by supplying electric power to the second load unit; based on an amount of current per unit time that is supplied to the laundry treatment apparatus being equal to or greater than a predetermined reference current amount, terminating the second cycle in the second treatment device and executing a third cycle in the second treatment device, the third cycle requiring a lower amount of current per unit time than that necessary to execute the second cycle; terminating the first cycle in the first treatment device; terminating the third cycle in the second treatment device and repeating the second cycle (S7, S73) in the second treatment device; and characterized in that after terminating the first cycle in the first treatment device and while repeating the second cycle in the second treatment device, repeating the first cycle in the first treatment device or executing a fourth cycle that is different from the first cycle in the first treatment device, wherein the repeated second cycle (S7, S73) in the second treatment device is performed until: an execution time of the repeated second cycle in the second treatment device reaches a predetermined second cycle reference time; or a sum of an execution time of the second cycle in the second treatment device and an execution time of the repeated second cycle in the second treatment device reaches the predetermined second cycle reference time; or the sum of the execution time of the second cycle in the second treatment device and the execution time of the repeated second cycle in the second treatment device reaches a sum of a predetermined additional time and the predetermined second cycle reference time. executing a first cycle in the first treatment device by supplying electric power to the first load unit; while executing the first cycle in the first treatment device, executing a second cycle in the second treatment device by supplying electric power to the second load unit; based on an amount of current per unit time that is supplied to the laundry treatment apparatus being equal to or greater than a predetermined reference current amount, terminating the second cycle in the second treatment device and executing a third cycle in the second treatment device, the third cycle requiring a lower amount of current per unit time than that necessary to execute the second cycle; terminating the first cycle in the first treatment device; terminating the third cycle in the second treatment device and repeating the second cycle (S7, S73) in the second treatment device; and characterized in that after terminating the first cycle in the first treatment device and while repeating the second cycle in the second treatment device, repeating the first cycle in the first treatment device or executing a fourth cycle that is different from the first cycle in the first treatment device, wherein the repeated second cycle (S7, S73) in the second treatment device is performed until: an execution time of the repeated second cycle in the second treatment device reaches a predetermined second cycle reference time; or a sum of an execution time of the second cycle in the second treatment device and an execution time of the repeated second cycle in the second treatment device reaches the predetermined second cycle reference time; or the sum of the execution time of the second cycle in the second treatment device and the execution time of the repeated second cycle in the second treatment device reaches a sum of a predetermined additional time and the predetermined second cycle reference time. an execution time of the repeated second cycle in the second treatment device reaches a predetermined second cycle reference time; or a sum of an execution time of the second cycle in the second treatment device and an execution time of the repeated second cycle in the second treatment device reaches the predetermined second cycle reference time; or the sum of the execution time of the second cycle in the second treatment device and the execution time of the repeated second cycle in the second treatment device reaches a sum of a predetermined additional time and the predetermined second cycle reference time.