The invention discloses an electronic record management device applying multimedia files with a copyright protection function and applying state encryption algorithm and relates to the technical field of information. The electronic record management device is capable of looking over and updating fine grit of record contents, and the fine grit refers to that looking over and updating of the record contents can be detailed to in-page elements. The electronic record management device structurally comprises a center management system and a record division management system, wherein the center management system comprises a key tree updater, a key tree storage unit, a cryptographic algorithm manager, an authority manager, a time stamp manager, a tree structure identification searcher and a record content centralized-storage unit; the record division management system comprises a filing device, a record content updater, a record content viewer, a record content storage unit, a division management authority manager and a cryptographic algorithm module. The electronic record management device is used for conforming to computerization trend of personnel file management, and meets the requirements for comprehensiveness, reality, authenticity, dynamism, mobility and confidentiality of personnel file management.