Provided are a system information transmission method and device, and a computer-readable storage medium, relating to the technical field of communications. The method comprises: sending a synchronization block and a system information block in a plurality of different directions by means of a beam, wherein the synchronization block comprises a synchronization signal, first system information, and position indication information about the system information block; the system information block refers to a system information block that is sent after the synchronization block, has the same direction as the synchronization block and is closest thereto in a time domain; the position indication information indicates a time-domain position or a time-domain position and a frequency-domain position where the system information block is located, and the system information block comprises an analytic parameter of a new radio physical downlink control channel (NR-PDCCH) where second system information is located, or the second system information.