Information forwarding method and space-based information network system

The embodiment of the invention provides an information forwarding method and a space-based information network system. In the method, a first target satellite sends a data packet sent by terminal equipment to a first integrated controller in a satellite sub-network where the first target satellite is positioned when the first target satellite does not meet preset forwarding conditions; the first integrated controller receives the data packet, judges whether a second target satellite which meets the preset forwarding conditions exists, sends the data packet to the second target satellite if yes so as to enable the second target satellite to send the data packet to terminal equipment used as a target party, and sends the data packet to a target secondary global controller if no; the target secondary global controller receives the data packet, and sends the data packet to a second integrated controller in a satellite sub-network where a third target satellite is positioned when judging that the third target sat