The invention discloses a charging adapting opening device and a stereo garage. The charging adapting opening device comprises a charging gun seat (10), a charging pile (20) and a gun plugging assembly. A plug (101) is arranged on the charging gun seat, and a socket (201) matched with the plug is arranged on the charging pile. The gun plugging assembly comprises a base (30) used for being fixed toa vehicle carrier (50) and a mounting table (40) mounted on the base in a floating mode. The mounting table is used for storing the charging gun seat. At least one guiding wheel set (401) is arrangedon the mounting table. Each guiding wheel set comprises a first guiding wheel (4011) and a second guiding wheel (4012), wherein rotating shafts of the first guiding wheel (4011) and the second guiding wheel (4012) are mutually parallel, and rims of the first guiding wheel (4011) and the second guiding wheel (4012) are arranged oppositely. First gun plugging guide columns (202) used for being plugged between the first guiding wheels and the second guiding wheels are arranged on the charging pile. The guiding wheel sets and the first gun plugging guide column are in rolling fit, therefore, thefriction resistance between the guiding wheel sets and the first gun plugging guide column is small, and accordingly plugging connection of the charging gun seat is convenient.