The invention belongs to the technical field of energy-saving and environment-friendly equipment, particularly relates to a multifunctional
water body moving power device. The device comprises a powerdevice and a power rod, and further comprises a box body, a partition plate, an expansion body, a communication valve, an
exhaust valve annular ventilation bin, an air intake and exhaust balance floater and a closed balance floater, wherein the box body, the partition plate, the expansion body, the communication valve, the
exhaust valve annular ventilation bin, the air intake and exhaust balancefloater and the closed balance floater are located in a
water body; the bottom of the box body is provided with the partition plate which is in sealed fit with the expansion body, a one-way valve is installed at the bottom of an air inlet hole in the power rod, and the communication valve is installed on the expansion body and the air intake and exhaust balance floater; and a bypass
pipe and an air inlet
pipe of the
exhaust valve annular ventilation bin are connected with the bottom of the box body and the top end of the expansion body respectively, an exhaust valve of the annular ventilationbin is installed in the box body, an air guide
pipe is arranged above the air intake and exhaust balance floater, and the air guide pipe is connected with an
air cavity on the air intake and exhaust balance floater. The device can exist in two environments such as the ground and a water bottom, wherein a liquid level fluctuation device and a liquid lifting device are ground environment equipment,and a main body
underwater gas supply device is positioned in a water bottom environment.