PURPOSE: To attain efficient fault analysis by outputting a command from a system console when system-down is detected, giving a read request of fault information to an electronic exchange and collecting fault detailed information automatically.

CONSTITUTION: A test execution section 12 of a system console 1 at the test start requests the execution processing of a test item to an electronic exchange 2 through an input/output control section 14. When the result of test is awaited, if system-down takes place, a read request processing of common fault information is implemented immediately from a main control section 11 to a fault information collection section 13 to collect data through an input/output control section 14. The collected data is analyzed by the main control section 11 to find out a processor number, execution module and execution section having a fault. Moreover, the collected data are outputted to a designated output device such as a magnetic disk 3, a printer 4 or a flexible disk 5.