A joint structure, a joint module and a method of assembling a joint structure on an object. The joint structure includes a body part and an actuating piece. The actuating piece combines movably with the body part, the actuating piece has a first joint part, the first joint part is located outside of the body part, the first joint part can carry out a vertical movement, lateral movement or rotational movement. Accordingly, the body part of the disclosure can go with the actuating piece or the first joint part, and combine to the first object and the second object, or disengage from the first object and the second object for achieving the effect of combining or separating at least two objects.