The invention relates to an electric energy regulating energy-saving device which is used for mounting the electric energy regulating energy-saving device. The electric energy regulating energy-saving device comprises a casing frame (7), a panel, a backboard, a longitudinal beam (23), a circuit breaker (8), a power panel (16), a main control panel (17), a fuse (11), a resistor (18), a contactor (13), a Hall sensor (15), a lightning arrester (19), a terminal strip (20), an aluminum heat radiator (3), a pulse capacitor (21), a reactor (22), an insulated gate bipolar transistor trigger plate (2)and an insulated gate bipolar transistor (4); a partition board (24) is arranged in the casing frame (7) and is positioned on the front side and above the reactor (22); the aluminum heat radiator (3)is arranged in front of and higher than the partition board (24); an air cooling inlet (33) of the insulated gate bipolar transistor and an air cooling inlet (27) of the reactor are respectively arranged at the lower part of the panel and the lower part of the backboard; and a centrifugal fan (31) and a small fan (29) are arranged at the top of the casing frame (7) in sequence. The electric energy regulating energy-saving device improves the action of the heat-radiating efficiency of the aluminum heat radiator.