How does maya make the camera lens always follow the object, that is, the camera body does not move, the lens follows, and every time the lens is made, it turns to one side.

Select the camera first, then the object. Find the constraint under the animation module, click it in the box to the right of the Aim command in its drop-down list, and uncheck the first option to keep the offset.

Click OK. You are trying to move this object now. If the camera is aimed in the wrong direction, just set the axis in the option just now.