To provide a fresh snow amount alarm composed of a new structure which can observe the amount of fresh snow day and night, and can accurately and efficiently decide whether or not snow removal and disposal work is required, and to provide fresh snow amount alarm system with a new structure using the alarm.

The fresh snow amount alarm 3 is provided with a control part 8 to which an amount of fresh snow setting part 5 capable of setting the amount of fresh snow for issuing an alarm, and an alarm part 7 are individually connected, receives a detection signal from an amount of fresh snow detector 2 at every setting time, and when a detected value therefrom reaches to or exceeds the set amount of fresh snow, can control automatically so that an alarm is issued through the alarm part 7.