The invention relates to a washing machine control method and device, a controller and a washing machine. A cloud system is configured in advance, the washing machine can establish communication connection with the cloud system, so that when the washing machine is used, after a voice module of the washing machine receives a voice instruction, if the washing machine is currently in communication connection with the cloud system, the working mode corresponding to the voice instruction can be determined through the cloud system and the washing machine is controlled to execute the working mode. According to the arrangement, firstly, the voice control function is set in the washing machine, so that function extension of the washing machine is achieved, the voice control function is more convenient for a user to use compared with key control, and the intelligent degree of the washing machine can be improved; and in addition, the cloud system is applied to analyze and process the voice instruction, the expansibility is higher, the capacity is larger, and the processing speed is higher.