A method for system message transmission, comprising: requesting, by a terminal, for system information to be used by the terminal from a network device via a dedicated control signaling; and receiving, by the terminal, the system information; wherein the network device is a source network device accessed by the terminal, and requesting, by a terminal, for system information to be used by the terminal from a network device via a dedicated control signaling comprises: requesting, by the terminal, for the system information from the source network device via the dedicated control signaling, and receiving, by the terminal, the system information comprises: receiving, by the terminal, system information, forwarded by the source network device, of a target network device, the target network device being a network device to which the terminal intends to be handed over from the source network device; characterized in that the dedicated control signaling comprises a measurement report; the measurement report comprises a result of measurement on neighboring cells of the source network device performed by the terminal, and the neighboring cells comprise a cell of the target network device. requesting, by a terminal, for system information to be used by the terminal from a network device via a dedicated control signaling; and receiving, by the terminal, the system information; wherein the network device is a source network device accessed by the terminal, and requesting, by a terminal, for system information to be used by the terminal from a network device via a dedicated control signaling comprises: requesting, by the terminal, for the system information from the source network device via the dedicated control signaling, and receiving, by the terminal, the system information comprises: receiving, by the terminal, system information, forwarded by the source network device, of a target network device, the target network device being a network device to which the terminal intends to be handed over from the source network device; characterized in that the dedicated control signaling comprises a measurement report; the measurement report comprises a result of measurement on neighboring cells of the source network device performed by the terminal, and the neighboring cells comprise a cell of the target network device. requesting, by the terminal, for the system information from the source network device via the dedicated control signaling, and receiving, by the terminal, the system information comprises: receiving, by the terminal, system information, forwarded by the source network device, of a target network device, the target network device being a network device to which the terminal intends to be handed over from the source network device; characterized in that the dedicated control signaling comprises a measurement report; the measurement report comprises a result of measurement on neighboring cells of the source network device performed by the terminal, and the neighboring cells comprise a cell of the target network device. receiving, by the terminal, system information, forwarded by the source network device, of a target network device, the target network device being a network device to which the terminal intends to be handed over from the source network device; characterized in that the dedicated control signaling comprises a measurement report; the measurement report comprises a result of measurement on neighboring cells of the source network device performed by the terminal, and the neighboring cells comprise a cell of the target network device.