An assembly comprising a limb positioning system and a surgical robotic device, wherein the limb positioning system and robotic device are connected to each other, wherein the limb positioning system is configured for positioning and maintaining immobilized a limb of a patient in a desired position with respect to a surgical table during orthopedic surgery, said limb positioning system comprising: - a pivoting member having a longitudinal portion extending along a corresponding longitudinal axis (A L), said pivoting member is configured such that said longitudinal axis (A L) is configured to be parallel to the surgical table; - a support member configured to support the limb of the patient; said support member comprises a support hooking part connected to said longitudinal portion and movable along said longitudinal portion; - a clutch connected to the pivoting member having an open configuration and a locked configuration, wherein, in the open configuration, the clutch enables pivoting of the pivoting member around a rotation axis (A R) that is parallel to the longitudinal axis (A L), distinct from the longitudinal axis (A L), and wherein, in the locked configuration, the clutch allows immobilization of the pivoting member in the desired position; - at least one fixation member configured to maintain the system in position with respect to the surgical table, and wherein the surgical robotic device comprises at least one movable member configured to pivot around a rotation axis coinciding with the rotation axis (A R) of the pivoting member of the limb positioning system. wherein the limb positioning system is configured for positioning and maintaining immobilized a limb of a patient in a desired position with respect to a surgical table during orthopedic surgery, said limb positioning system comprising: - a pivoting member having a longitudinal portion extending along a corresponding longitudinal axis (A L), said pivoting member is configured such that said longitudinal axis (A L) is configured to be parallel to the surgical table; - a support member configured to support the limb of the patient; said support member comprises a support hooking part connected to said longitudinal portion and movable along said longitudinal portion; - a clutch connected to the pivoting member having an open configuration and a locked configuration, wherein, in the open configuration, the clutch enables pivoting of the pivoting member around a rotation axis (A R) that is parallel to the longitudinal axis (A L), distinct from the longitudinal axis (A L), and wherein, in the locked configuration, the clutch allows immobilization of the pivoting member in the desired position; - at least one fixation member configured to maintain the system in position with respect to the surgical table, and - a pivoting member having a longitudinal portion extending along a corresponding longitudinal axis (A L), said pivoting member is configured such that said longitudinal axis (A L) is configured to be parallel to the surgical table; - a support member configured to support the limb of the patient; said support member comprises a support hooking part connected to said longitudinal portion and movable along said longitudinal portion; - a clutch connected to the pivoting member having an open configuration and a locked configuration, wherein, in the open configuration, the clutch enables pivoting of the pivoting member around a rotation axis (A R) that is parallel to the longitudinal axis (A L), distinct from the longitudinal axis (A L), and wherein, in the locked configuration, the clutch allows immobilization of the pivoting member in the desired position; - at least one fixation member configured to maintain the system in position with respect to the surgical table, and wherein the surgical robotic device comprises at least one movable member configured to pivot around a rotation axis coinciding with the rotation axis (A R) of the pivoting member of the limb positioning system.