The invention discloses a balanced type energy saving fully automatic underground parking garage for motor vehicles and a technology, and belongs to the field of mechanized equipment and automobile industry. Centralized three-dimensional intelligent parking of the motor vehicles is an important problem of modern city development, at present, most underground parking garages are in an original free parking state, and a small number of the automatic underground parking garages have many problems at aspects of degree of automation, efficiency and the like. According to the balanced type energy saving fully automatic underground parking garage for the motor vehicles and the technology, a car to-be-parked enters a hanging basket type parking space through the center of two composite hollow power wheels, and power is provided by a motor power assembly driven by a worm and gear with adjustable speed. Hanging basket assemblies used for parking are hanged on symmetrically power chains evenly and returns through the space between two non-central shaft hollow chain wheels which are symmetrical at lower portion without barriers, underground entering and exiting cycle parking of cars is formed, then a deep well type parking garage unit with function of balanced type energy saving and fully automatic administration is obtained, and a plurality of the units can be installed in parallel to achieve multitudinous storage of the motor vehicles.