Abstract: The present application provides a device, a mobile robot, and a system to operate a method for navigation path tracking control. The device includes: one or more storage media, storing a set of instructions for tracking and controlling a navigation path; and one or more processors in communication with the one or more storage media, wherein during operation the one or more processors execute the set of instructions to: obtain a location of a mobile robot; determine, in a navigation path, a target point that satisfies a preset location relationship with the location of the mobile robot; and control the mobile robot to move toward the target point in the navigation path. In this way, accurate tracking control is implemented on the navigation path of the mobile robot, and accuracy and robustness of tracking control are improved.