PURPOSE: To obtain a connection monitoring system which gives the information of the stoppage or the restoration of a data base management system(DBMS) to an application program at the time of the stoppage of the DBMS.

CONSTITUTION: The connection monitoring system 12 is provided with a recognizing means, 14 to recognize the DBMS 30 to be a connected object, a monitoring means 15 to monitor the DBMS 30 to be the connected object at every definite period of time, an operating state informing means 16 to inform of the occurrence of the fault of the DBMS 30 to be the connected object, an acquiring and preserving means 17 to preserve the history of an accessing command from the application program 20 in a data file 40, and a restoration informing means 18 to inform of the restoration of the DBMS 30.