An energy-saving environmentally friendly generator includes at least one generator (1; 1a, 1b) for generating electricity, at least one weighting system (11), at least one transmission gear system (3), at least one starting system (2), and at least one electricity-conveying system (5). The generator is started to generate electricity. Based on the principle of relative theory of large/small gears and through the transmission gears (12, 21, and 41) of various sizes in the transmission gear system, various speed changes are generated to create torques, thereby releasing energy that is multiple times of a primitive energy for the starting system. Speed change and energy are then utilized to urge the generator to reach the rated speed and energy for generating electricity, and simultaneous rotation of the weight system is also utilized to generate multifold energy for counterbalancing the load of generating and the load of consumption of electricity of the generator, thereby allowing normal operation of the generator. A portion of electricity generated by the generator is supplied to the starting system. At this time, the starting energy supplied to the generator is cut off to allow self-operation of the generator for generating purposes.
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