A method for indicating period information of a common control resource set (CORESET) of remaining key system information (RMSI), includes: adding indication information to a physical broadcast channel (PBCH) of a synchronous broadcast block (SSB), wherein the indication information includes first indication information, and the first indication information is used for indicating a positional relationship between a half radio frame where a CORESET of RMSI corresponding to the SSB is located and a half radio frame where the SSB is located; and sending, in a beam scanning manner, the SSB carrying the indication information to user equipment (UE).