This application provides a satellite communication device and method, the method including obtaining ephemeris information of a satellite in a satellite network, the ephemeris information of the satellite in the satellite network including one or more a beam parameter of the satellite in the satellite network, a physical resource of the satellite in the satellite network, or scheduling information of the satellite in the satellite network, generating a first message based on the ephemeris information of the satellite in the satellite network, where the first message includes ephemeris information of one or more satellites that serve a terminal device, and sending the first message when the terminal device performs random access, to implement communication between the terminal device and the one or more satellites.