Speed converting apparatus with load controlling function and information processing system

A speed converting apparatus with a load controlling function comprises a first interface unit (10) operating for an emulation device (2) according to a system clock of the emulation device (2), a second interface unit (20) operating for an arithmetic unit (3) according to a system clock of the arithmetic unit (3), and a load controlling unit (30) interposed between the first interface unit (10) and the second interface unit (20) to control at least either a load of a request outputted to the emulation device (2) on the emulation device (2) or a load of a request outputted to the arithmetic unit (3) on the arithmetic unit (3). In performance verification or connection verification of a target to be verified, the speed converting apparatus can vary a load of a request issued to the target to be verified on the target or a load issued to a verification device on the verification device, while absorbing a difference in operation speed between the target to be verified and the verification device.