A memory auxiliary device comprises a brain memory back-up module, a storage module, an
auxiliary memory module, an information collection module and a man-
machine interaction module, wherein the brain memory back-up module is used for receiving collected information content needing to be memorized by the brain of a user, analyzing key parts and events in the information content, and generating
auxiliary memory history data according to scenes or key content at the moment, the storage module is used for storing the
auxiliary memory history data, the auxiliary
memory module is used for receiving collected partial information recalled by the user, and finding out
data content meeting conditions from the auxiliary memory history data, the information collection module is used for collecting the information content needing to be memorized by the brain of the user and collecting the partial information recalled by the user, and the man-
machine interaction module is used for collecting and executing instructions of the user and displaying results of instruction execution. As for the instructions related to memory back-up, the information collection module is activated for collecting the auxiliary memory data; as for the instructions related to memory
reproduction, the information collection module is activated for collecting the partial content recalled by the brain.