A message transmission method, executed by a first terminal, the method comprising: sending an instant messaging message to a second terminal, the instant messaging message being a message input in a first chat interface, wherein the first chat interface is an interface of an instant messaging application that is being run in the first terminal and the second terminal; switching, responsive to determining that a transmission mode switching condition is satisfied, the first chat interface to a second chat interface, the second chat interface being used for displaying a Low-Power Wide-Area Network, LPWAN, communication record between the first terminal and the second terminal; acquiring a first LPWAN communication message input in the second chat interface; and sending the first LPWAN communication message to the second terminal through a connection with the second terminal for display of the first LPWAN communication message in the second chat interface of the second terminal, characterized in that, switching, responsive to determining that the transmission mode switching condition is satisfied, the first chat interface to the second chat interface comprises: acquiring target configuration information of the second terminal from a pairing list according to target account information of an instant messaging account corresponding to the second terminal, the pairing list comprising a correspondence between configuration information and account information of paired terminals, wherein the configuration information comprises LPWAN information; and switching, responsive to determining that scanning information obtained by the first terminal comprises the target configuration information, the first chat interface to the second chat interface, wherein before sending the instant messaging message to the second terminal, the method further comprises: performing pairing with the second terminal, and adding the target configuration information of the second terminal into the pairing list after pairing; acquiring the target account information of the instant messaging account corresponding to the second terminal; and storing the target account information and the target configuration information in association with each other. sending an instant messaging message to a second terminal, the instant messaging message being a message input in a first chat interface, wherein the first chat interface is an interface of an instant messaging application that is being run in the first terminal and the second terminal; switching, responsive to determining that a transmission mode switching condition is satisfied, the first chat interface to a second chat interface, the second chat interface being used for displaying a Low-Power Wide-Area Network, LPWAN, communication record between the first terminal and the second terminal; acquiring a first LPWAN communication message input in the second chat interface; and sending the first LPWAN communication message to the second terminal through a connection with the second terminal for display of the first LPWAN communication message in the second chat interface of the second terminal, characterized in that, switching, responsive to determining that the transmission mode switching condition is satisfied, the first chat interface to the second chat interface comprises: acquiring target configuration information of the second terminal from a pairing list according to target account information of an instant messaging account corresponding to the second terminal, the pairing list comprising a correspondence between configuration information and account information of paired terminals, wherein the configuration information comprises LPWAN information; and switching, responsive to determining that scanning information obtained by the first terminal comprises the target configuration information, the first chat interface to the second chat interface, acquiring target configuration information of the second terminal from a pairing list according to target account information of an instant messaging account corresponding to the second terminal, the pairing list comprising a correspondence between configuration information and account information of paired terminals, wherein the configuration information comprises LPWAN information; and switching, responsive to determining that scanning information obtained by the first terminal comprises the target configuration information, the first chat interface to the second chat interface, wherein before sending the instant messaging message to the second terminal, the method further comprises: performing pairing with the second terminal, and adding the target configuration information of the second terminal into the pairing list after pairing; acquiring the target account information of the instant messaging account corresponding to the second terminal; and storing the target account information and the target configuration information in association with each other. performing pairing with the second terminal, and adding the target configuration information of the second terminal into the pairing list after pairing; acquiring the target account information of the instant messaging account corresponding to the second terminal; and storing the target account information and the target configuration information in association with each other.