The present disclosure provides an electronic device using a battery locking mechanism. The electronic device includes a main body defining a receiving space to receive a battery. A battery locking mechanism mounted in the receiving space includes a sliding member and a rotatable member rotatably connected with each other through a connection portion. The sliding member includes a elastic member and a sliding bar, the rotatable member includes a through hole in a position between its two opposite ends and a hook formed at its free end, a shaft extends from the bottom surface of the receiving space extending through the through hole, allowing the rotatable member to rotate about the shaft. A battery locking mechanism applied in an electronic device is also provided.