The utility model provides a generating set, which is composed of a generator, a speed changer, a plurality of supporting frameworks and gravity driving devices arranged between each two adjacent supporting frameworks. The supporting frameworks are in parallel arrangement, and structures of the gravity driving devices arranged between two adjacent supporting frameworks are the same. The generating set of the utility model is used to utilize a crow bar to raise heavy objects at one end of a lever to a certain height by labor power, the heavy objects are dropped down under gravitational force to drive the generator to generate power, thereby depending on the gravity working, which not only is environment-friendly, but also saves labor power, physical resources and financial resources.