The invention is to provide an electronic device battery pack removal and emplacement lock structure consisting of a compartment recessed in the case of an electronic device for the installing a battery pack, a minimum of one hook block proximal to its end at one side between the said battery pack and the said compartment, a minimum of one tapered polyhedron proximal to its other end, and a release structure internally disposed in the said compartment. As such, when the said battery pack is placed into the said compartment, the said tapered polyhedron pushes the said release structure until the said battery pack is completely ensconced within the said compartment, following which the said release structure automatically returns to its original position to restrain the said tapered polyhedron and render it immovable.