Magnetoelectric sensing type water level detection device and system

The invention discloses a magnetoelectric sensing type water level detection device. The device comprises an end cover, an upper storage part, an isolation part, a lower storage part, a floater, a permanent magnet and a radio emission module; the upper end of the upper storage part is connected with the end cover; the lower end of the upper storage part is connected with the lower storage part; the isolation part is arranged between the upper storage part and the lower storage part; the radio transmitting module is arranged in the upper storage part; the floater is arranged in the lower storage part; the permanent magnet is arranged at the upper part of the floater; the permanent magnet triggers the radio transmitting module to form a magnetoelectric sensing generation loop. The device hasthe advantages of simple structure, convenience in operation, novel style, small size, light weight, high sensitivity, high measurement accuracy, small measurement error, small influence of well depth, easiness in signal ide