The invention belongs to the technical field of washing machines and discloses a method and device for using a washing machine on a time-limited water supply occasion and the washing machine. The method includes the steps of receiving application area information input by a user and saving the information; obtaining the arrival time of a local water source; pushing a message including the arrivaltime of the water source to the user; saving the arrival time information of the water source and starting count-down; detecting whether or not the user sees the message including the arrival time ofthe water source; if the user sees the message, switching to a stage of waiting for the user to put clothes into the washing machine; if the user does not see the message at set time, reminding the user to check the arrival time of the water source; in the stage of waiting for the user to put the clothes into the washing machine, detecting whether or not the clothes are put in the washing machine;if yes, washing the clothes automatically when the water source arrives; if not, reminding the user to put the clothes into the washing machine. By means of the method, the arrival time of the watersource can be obtained, it is ensured that the user can be informed when the water source arrives, and the situation that the user forgets to wash the clothes or does not wash the clothes in time is avoided.