Disclosed is a robot assembly, including: a robot body and a charging pile, wherein a chassis of the robot body is provided with a positioning groove and a guide groove, a first positive electrode contact and a first negative electrode contact are arranged in the positioning groove, the charging pile is provided with a contact seat selectively matching the positioning groove, and the contact seat is provided with a second positive electrode contact and a second negative electrode contact; and the guide groove has a larger cross-sectional area than the positioning groove, the contact seat enters the positioning groove under the guide action of the guide groove, so that the first positive electrode contact makes contact with the second positive electrode contact, and the first negative electrode contact makes contact with the second negative electrode contact.