To provide a wide-area remote collection work system which collects data mainly by optical communication and delivers forms and works related to the preservation of security to a supply enterpriser.

A transmitter-receiver (3) has control, storage, transmission, reception, and display functions to sum up numerical values of consumed quantities from various meters (2) of a demander (1) and successively compares each numerical value per unit time with a set value to discriminate whether it is equal to or larger than the set value or not and holds and stores the numerical value to not only display it but also issues an abnormality signal as a security preservation signal in the case that the numerical value is equal to or larger than the set value. With respect to counting of monthly consumed quantities, numerical values can be successively stored for about three months, and the integral quantity can be confirmed and the set numerical value can be displayed.