A self-moving device (100) and system, said device comprising a body (1), a cutting assembly (4) and a wheel set (2), a driving assembly for driving the cutting assembly and the wheel set to operate, a control system (7) for controlling the driving assembly, and a battery pack (6) for supplying power； the self-moving device further comprises a battery pack mounting part (3) which is provided on the body and comprises a battery pack connector (32) for electrically connecting the battery pack, the battery pack connector being the same as a battery pack connector on electric tools different from the self-moving device； and the self-moving device further comprises a charging part (5) for directly connecting an external power supply, so as to directly charge the self-moving device. The battery pack connector on the self-moving device is configured to have the same model as that of the battery pack connector on other electric tools, such that the battery pack is universally used for different models of electric tools； in addition, when an operator needs to use the battery pack immediately or multiple times, the charging part provided on the self-moving device can be directly connected to an external power supply to charge the battery pack.La présente invention concerne un dispositif (100) et un système automoteurs, ledit dispositif comprenant un corps (1), un ensemble de coupe (4) et un ensemble roue (2), un ensemble d'entraînement pour commander le fonctionnement de l'ensemble de coupe et de l'ensemble roue, un système de commande (7) pour commander l'ensemble d'entraînement, et un bloc-batterie (6) pour fournir de l'énergie； le dispositif automoteur comprend en outre une partie de montage de bloc-batterie (3) qui est placée sur le corps et comprend un connecteur de bloc-batterie (32) pour connecter électriquement le bloc-batterie, le connecteur de bloc-batterie étant identique à un connecteur de bloc-batterie sur des outils électriques différents du dispositif automoteu
