A server rack system includes a communication module, multiple internal devices, and an integrated management module (IMM). The internal devices are coupled to the communication module. The IMM is coupled to the communication module and communicates with the internal devices through the communication module. The IMM is pre-stored with a correspondence relationship between marker information, identification information, and asset numbers of the internal devices. In operation of the system, the IMM reads the identification information of the internal devices through the communication module, and obtains a correspondence relationship between the marker information and asset numbers of the internal devices from the correspondence relationship according to the identification information to thereby perform asset management of the internal devices.