Methods and devices for transmitting and receiving short message with signature line by mobile terminal

The invention relates to a method for transmitting a short message with a signature line by a mobile terminal, a device for transmitting the short message with the signature line by the mobile terminal, the method for receiving the short message with the signature line by the mobile terminal and the device for receiving the short message with the signature line by the mobile terminal. The transmission method comprises the following steps of: 101, acquiring an edited short message; 102, judging whether a signature line function is to be activated or not; 103, if a judgment result obtained by the step 102 indicates that the signature line function is to be activated, setting reserved bits for the signature line to inform a called mobile terminal that the short message has the signature line, wherein the signature line is stored on a signature line server on a network side by a calling mobile terminal in advance; and 104, if the judgment result obtained by the step 102 indicates that the signature line function