A data transmission method for a host and a data reception method for a multifunction device are disclosed. Data of one mode are received from the host even when the multifunction device performs in a specific mode and returns again to a previous mode after reception of the data in the one mode, thereby providing no damage to the operation in the previous mode. The data transmission method for a host connected to a multifunction device includes the steps of: detecting the mode of the multifunction device corresponding to data in response to a data transmission command to the multifunction device; transmitting a signal indicative of the detected mode to the multifunction device; and transmitting the data to the multifunction device after transmission of the signal.