According to an embodiment of the present invention, a method of controlling wash timing using an intelligent washer comprises determining to perform a wash, calculating a required time for the wash, predicting a return time of the user, and determining a start time of the wash to terminate the wash corresponding to the return time. According to an embodiment, the washer may be related to artificial intelligence (AI) modules, unmanned aerial vehicles (UAVs), robots, augmented reality (AR) devices, virtual reality (VR) devices, and 5G service-related devices.