A motion control system includes a first capsule robot, which includes a first housing, a first shaft configured to be movable bi-directionally, the first shaft having a first permanent magnet at an outer end, a first leg unit configured to protrude outwards from the first housing, and a first control unit and a second capsule robot, which includes a second housing, a second shaft configured to be movable bi-directionally, the second shaft having a second permanent magnet at an outer end, a second leg unit, and a second control unit, wherein the first capsule robot is fixed with respect to an the internal organ wall by protruding the first leg unit to the internal organ, and wherein the second capsule robot is connected to the first capsule robot as the first permanent magnet comes into contact with the second permanent magnet by an attractive force.
