The present invention discloses a memory access method, a buffer scheduler, and a memory module, which can support multiple application scenarios without changing the memory module or a memory chip. The method includes: receiving an operation request message for memory access data, where the operation request message includes tag information of the memory access data, operation information of the memory access data, and a memory address of the memory access data; and performing, according to at least one of the tag information of the memory access data, a 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 stored in the memory module. The present invention is applicable to the computer field.