A system information processing method, comprising: receiving a first synchronization signal; and identifying whether configuration information of the first synchronization signal is configured as an indication for a system information change; and if it is identified that the configuration information of the first synchronization signal is configured as the indication for a system information change, receiving broadcast system information, and updating a mapping relationship between a current synchronization signal and the system information according to the first synchronization signal and the received broadcast system information; wherein before the receiving a first synchronization signal, the method further comprises: receiving and saving a third synchronization signal; and receiving broadcast third system information, and establishing the mapping relationship between the current synchronization signal and the system information according to the third synchronization signal and the third system information; wherein the third synchronization signal comprises N groups of configuration information, the third system information comprises N parts of system information, and the ith group of configuration information corresponds to the ith part of system information and is used to indicate whether the ith part of system information changes, wherein both i and N are positive integers, and i is less than or equal to N; and wherein the identifying whether configuration information of the first synchronization signal is configured as an indication for a system information change; and if it is identified that the configuration information of the first synchronization signal is configured as the indication for a system information change, receiving broadcast system information, and updating a mapping relationship between a current synchronization signal and the system information according to the first synchronization signal and the received broadcast system information comprises: identifying whether the configuration information of the first synchronization signal is configured as the indication for a system information change; and if it is identified that the ith group of configuration information of the first synchronization signal is configured as an indication for a change of the ith part of system information of the first system information, receiving the ith part of broadcast system information, and updating the first synchronization signal and the first system information in the mapping relationship between the current synchronization signal and the system information according to the ith group of configuration information and the ith part of system information. receiving a first synchronization signal; and identifying whether configuration information of the first synchronization signal is configured as an indication for a system information change; and if it is identified that the configuration information of the first synchronization signal is configured as the indication for a system information change, receiving broadcast system information, and updating a mapping relationship between a current synchronization signal and the system information according to the first synchronization signal and the received broadcast system information; wherein before the receiving a first synchronization signal, the method further comprises: receiving and saving a third synchronization signal; and receiving broadcast third system information, and establishing the mapping relationship between the current synchronization signal and the system information according to the third synchronization signal and the third system information; receiving and saving a third synchronization signal; and receiving broadcast third system information, and establishing the mapping relationship between the current synchronization signal and the system information according to the third synchronization signal and the third system information; wherein the third synchronization signal comprises N groups of configuration information, the third system information comprises N parts of system information, and the ith group of configuration information corresponds to the ith part of system information and is used to indicate whether the ith part of system information changes, wherein both i and N are positive integers, and i is less than or equal to N; and wherein the identifying whether configuration information of the first synchronization signal is configured as an indication for a system information change; and if it is identified that the configuration information of the first synchronization signal is configured as the indication for a system information change, receiving broadcast system information, and updating a mapping relationship between a current synchronization signal and the system information according to the first synchronization signal and the received broadcast system information comprises: identifying whether the configuration information of the first synchronization signal is configured as the indication for a system information change; and if it is identified that the ith group of configuration information of the first synchronization signal is configured as an indication for a change of the ith part of system information of the first system information, receiving the ith part of broadcast system information, and updating the first synchronization signal and the first system information in the mapping relationship between the current synchronization signal and the system information according to the ith group of configuration information and the ith part of system information.