To increase fault tolerance while efficiently using hardware resources in a fault-tolerant system.

A resource management apparatus 20 comprises a computer table 23 storing information indicating use states of resources of a plurality of computers C5 to C8, an AP table 22 storing information about resources necessary for an application AP5 to execute predetermined processing on a predetermined computer, and a computer selection part 21 for, when detecting the switching in which an AP module 205 standing by to back up an AP module 105 of the application AP5 starts to operate in place of the AP module 105, referring to the AP table 22 and the computer table 23 to select one computer from the computers C5 to C8 and commanding the start of an AP module for backing up the AP module 205, on an emulator operated on the selected computer to emulate a given computer.