A memory access method, applied to a buffer scheduler, wherein the method comprises: receiving an operation request message for memory access data, wherein the operation request message comprises tag information of the memory access data, operation information of the memory access data, and memory address information of the memory access data, wherein the tag information of the memory access data comprises a tag type, and the tag type is used to instruct the buffer scheduler to perform an operation on the memory access data and/or a tag of the memory access data; and performing, according to at least one of the tag information of the memory access data, the memory address of the memory access data, and the operation information of the memory access data, an operation on the tag of the memory access data and/or the memory access data that are stored in a memory module, characterised in that the performing comprises: determining, according to the tag type, whether to perform an operation on the tag of the memory access data; if an operation is performed on the tag of the memory access data, using the memory address of the memory access data as an index and querying a pre-stored memory access tag location mapping table to determine a memory address of the tag of the memory access data, and performing, according to at least one of the tag information of the memory access data, the memory address of the tag of the memory access data, the memory address of the memory access data, and the operation information of the memory access data, an operation on the tag of the memory access data, or the tag of the memory access data and the memory access data; and if no operation is performed on the tag of the memory access data, performing, at least according to the memory address of the memory access data and the operation information of the memory access data, an operation on the memory access data that is stored in the memory module. receiving an operation request message for memory access data, wherein the operation request message comprises tag information of the memory access data, operation information of the memory access data, and memory address information of the memory access data, wherein the tag information of the memory access data comprises a tag type, and the tag type is used to instruct the buffer scheduler to perform an operation on the memory access data and/or a tag of the memory access data; and performing, according to at least one of the tag information of the memory access data, the memory address of the memory access data, and the operation information of the memory access data, an operation on the tag of the memory access data and/or the memory access data that are stored in a memory module, characterised in that the performing comprises: determining, according to the tag type, whether to perform an operation on the tag of the memory access data; if an operation is performed on the tag of the memory access data, using the memory address of the memory access data as an index and querying a pre-stored memory access tag location mapping table to determine a memory address of the tag of the memory access data, and performing, according to at least one of the tag information of the memory access data, the memory address of the tag of the memory access data, the memory address of the memory access data, and the operation information of the memory access data, an operation on the tag of the memory access data, or the tag of the memory access data and the memory access data; and if no operation is performed on the tag of the memory access data, performing, at least according to the memory address of the memory access data and the operation information of the memory access data, an operation on the memory access data that is stored in the memory module. determining, according to the tag type, whether to perform an operation on the tag of the memory access data; if an operation is performed on the tag of the memory access data, using the memory address of the memory access data as an index and querying a pre-stored memory access tag location mapping table to determine a memory address of the tag of the memory access data, and performing, according to at least one of the tag information of the memory access data, the memory address of the tag of the memory access data, the memory address of the memory access data, and the operation information of the memory access data, an operation on the tag of the memory access data, or the tag of the memory access data and the memory access data; and if no operation is performed on the tag of the memory access data, performing, at least according to the memory address of the memory access data and the operation information of the memory access data, an operation on the memory access data that is stored in the memory module.