The invention relates to a file management method. The method comprises the following steps: S1, obtaining a reading and writing operation of a file by a current user; S2: The read/write information and the current user information are stored in two-dimensional association. The invention can support subsequent user-centered file management by saving user-centered file reading and writing operation, thereby saving user's storage space to the maximum extent, improving storage utilization rate of intelligent equipment, reducing energy consumption of the whole system, and achieving the purpose ofenergy conservation and environmental protection.