A turntable structure (11a, 11b), comprising: a cleaning turntable (111a, 111b, 111c), one side of the cleaning turntable (111a, 111b, 111c) being connected with a cleaning piece configured to clean a floor; an adjusting component (112a, 112b, 112c) slidably connected with the cleaning turntable (111a, 111b, 111c) along a target direction, and located on a side of the cleaning turntable (111a, 111b, 111c) facing away from the cleaning piece, the target direction being parallel to a rotating shaft of the cleaning turntable (111a, 111b, 111c), and one side of the adjusting component (112a, 112b, 112c) far away from the cleaning piece being connected with a driving mechanism of a robot to drive the cleaning turntable (111a, 111b, 111c) to rotate; a pressure unit provided between the cleaning turntable (111a, 111b, 111c) and the adjusting component (112a, 112b, 112c), and configured to apply a vertical downward force to the cleaning turntable (111a, 111b, 111c) when the target direction is perpendicular to a horizontal plane; and a limiting structure configured to limit a sliding distance of the cleaning turntable relative to the adjusting component along the target direction; wherein the limiting structure comprises a limiting block (1141a, 1141b) and a limiting groove (1142a, 1142b), wherein the limiting block (1141a, 1141b) is accommodated in the limiting groove (1142a, 1142b), characterized in that a groove wall of the limiting groove (1142a, 1142b) is configured to limit a moving distance of the limiting block (1141a, 1141b) along the target direction; the limiting block (1141a, 1141b) and the limiting groove (1142a, 1142b) are provided between the adjusting component (112a, 112b, 112c) and the cleaning turntable (111a, 111b, 111c), or the limiting block (1141a, 1141b) is provided on the adjusting component (112a, 112b, 112c) and the limiting groove (1142a, 1142b) is provided on the cleaning turntable (111a, 111b, 111c), or the limiting block (1141a, 1141b) is provided on the cleaning turntable (111a, 111b, 111c) and the limiting groove (1142a, 1142b) is provided on the adjusting component (112a, 112b, 112c). a cleaning turntable (111a, 111b, 111c), one side of the cleaning turntable (111a, 111b, 111c) being connected with a cleaning piece configured to clean a floor; an adjusting component (112a, 112b, 112c) slidably connected with the cleaning turntable (111a, 111b, 111c) along a target direction, and located on a side of the cleaning turntable (111a, 111b, 111c) facing away from the cleaning piece, the target direction being parallel to a rotating shaft of the cleaning turntable (111a, 111b, 111c), and one side of the adjusting component (112a, 112b, 112c) far away from the cleaning piece being connected with a driving mechanism of a robot to drive the cleaning turntable (111a, 111b, 111c) to rotate; a pressure unit provided between the cleaning turntable (111a, 111b, 111c) and the adjusting component (112a, 112b, 112c), and configured to apply a vertical downward force to the cleaning turntable (111a, 111b, 111c) when the target direction is perpendicular to a horizontal plane; and a limiting structure configured to limit a sliding distance of the cleaning turntable relative to the adjusting component along the target direction; wherein the limiting structure comprises a limiting block (1141a, 1141b) and a limiting groove (1142a, 1142b), wherein the limiting block (1141a, 1141b) is accommodated in the limiting groove (1142a, 1142b), characterized in that a groove wall of the limiting groove (1142a, 1142b) is configured to limit a moving distance of the limiting block (1141a, 1141b) along the target direction; the limiting block (1141a, 1141b) and the limiting groove (1142a, 1142b) are provided between the adjusting component (112a, 112b, 112c) and the cleaning turntable (111a, 111b, 111c), or the limiting block (1141a, 1141b) is provided on the adjusting component (112a, 112b, 112c) and the limiting groove (1142a, 1142b) is provided on the cleaning turntable (111a, 111b, 111c), or the limiting block (1141a, 1141b) is provided on the cleaning turntable (111a, 111b, 111c) and the limiting groove (1142a, 1142b) is provided on the adjusting component (112a, 112b, 112c).