To provide an alarm system for managing energy consumption integrated value.

The warning system includes [a] at least one of the integrated power meters (11-1 to 11-m); [b] a control function display device (31) calculating and displaying a control function C(t) value which increases from a start time point T0 in the management period to an end time point TN in proportion to an elapse time t from the time point T0 and reaches a preset allowable limit value EMAX of the total energy consumption in the management period, at the end time point TN, at each of predetermined sampling times T1, T2, T3, ..., Tn; and [c] an alarm transmitter (41) which issues a predetermined alarm when the total integrated power amount W(t) exceeds the control function C(t) by comparing the total integrated power amount W(t) of at least one integrated power meter (11) installed with the control function C(t) at the corresponding time at each of the sampling times T1, T2, T3, ..., TN.