A transmission control method, wherein the transmission control method comprises: sending/receiving, by a first device, first data to/from a second device through a first communication connection, wherein the first communication connection is a wireless fidelity, Wi-Fi connection; in a process in which the first device sends/receives the first data to/from the second device through the first communication connection, detecting, by the first device, that an error occurs on the first communication connection; and sending, by the first device, error information of the first communication connection to the second device through a second communication connection, wherein the second communication connection is different from the first communication connection, and the error information is used to indicate that the error occurs on the first communication connection; characterised in that before the sending, by the first device, error information of the first communication connection to the second device through a second communication connection, the method further comprises: selecting, by the first device, the second communication connection from one or more communication connections in response to detection of the error that occurs on the first communication connection, wherein the second communication connection is a communication connection that is in the one or more communication connections and through which power consumption is lowest and/or a transmission rate is highest; wherein the one or more communication connections comprise all other communication connections than the first communication connection that have been established between the first device and the second device. sending/receiving, by a first device, first data to/from a second device through a first communication connection, wherein the first communication connection is a wireless fidelity, Wi-Fi connection; in a process in which the first device sends/receives the first data to/from the second device through the first communication connection, detecting, by the first device, that an error occurs on the first communication connection; and sending, by the first device, error information of the first communication connection to the second device through a second communication connection, wherein the second communication connection is different from the first communication connection, and the error information is used to indicate that the error occurs on the first communication connection; characterised in that before the sending, by the first device, error information of the first communication connection to the second device through a second communication connection, the method further comprises: selecting, by the first device, the second communication connection from one or more communication connections in response to detection of the error that occurs on the first communication connection, wherein the second communication connection is a communication connection that is in the one or more communication connections and through which power consumption is lowest and/or a transmission rate is highest; wherein the one or more communication connections comprise all other communication connections than the first communication connection that have been established between the first device and the second device. selecting, by the first device, the second communication connection from one or more communication connections in response to detection of the error that occurs on the first communication connection, wherein the second communication connection is a communication connection that is in the one or more communication connections and through which power consumption is lowest and/or a transmission rate is highest; wherein the one or more communication connections comprise all other communication connections than the first communication connection that have been established between the first device and the second device.