Hi feirui445, yes like Pilou says there isn't a specific command for that but you can get it done using the Transform > Move command using a construction line to find the midpoint between them for the first move.

Usually NURBS modeling is at its best when you are generating your model from mostly 2D profile curves, rather than directly placing surface control points. So surface control point editing is not a major focus area in MoI's toolset like it would be in a polygon modeler.

- Michael