Adjusting mechanism and low-grade heat energy power generation system and method

The invention provides an adjusting mechanism and a low-grade heat energy power generation system and method. The low-grade heat energy power generation system comprises a low-position water tank and a high-position water tank, and multiple sets of upper hydraulic cylinders and lower hydraulic cylinders which are sequentially connected are arranged between the low-position water tank and the high-position water tank in a staggered mode; the hydroelectric generating set is arranged on a pipeline between the high-level water tank and the low-level water tank so as to generate power by using water flowing from the high-level water tank to the low-level water tank; a heat source heat exchange side and a cold source heat exchange side are also connected in the adjusting mechanism, so that the air pressure in the upper air adjusting mechanism is changed; the control mechanism is used for regulating and controlling the states of all components of the low-grade heat energy power generation system. According to the lo