A server rack system module is provided. Each rack internal device at least includes a control chip, and the rack internal devices include a plurality of servers. An integrated management module (IMM) is respectively coupled to the control chips, where the IMM stores integrated management firmware, and the integrated management firmware has latest version firmware of the control chip integrated therein and records latest version serial numbers of the latest version firmware. When the server rack system is started, the IMM reads a current version serial number of currently installed firmware of each control chip, and compares the current version serial number with the corresponding latest version serial number, so as to determine whether to update the currently installed firmware.