The hip joint, a ball-and-socket articulation connecting the pelvis and femur, allows three-axis rotational movements crucial for defining joint performance. However, current evaluation methods for the range of motion are limited, focusing solely on uniaxial motions such as flexion, abduction, and internal/external rotation. In reality, dislocation scenarios in artificial hip joints often involve multi-axis movements, such as a combination of flexion and internal rotation, surpassing the scope of conventional assessments. This study proposes a method to represent the full range of motion by expressing the three-axis orientation of the hip joint as plots on a three-dimensional graph using polar coordinates. This approach defines thigh orientation in polar coordinates as latitude and longitude and represents rotation around the thigh axis as the distance from the origin. Practical measurements of the range of motion for both biological and artificial hip joints were plotted on the graph, demonstrating the comprehensive representation of their entire motion range. Furthermore, it visualized that the commonly identified limb posture with risk of dislocation was included in the range of motion of the biological hip joint and was not of the artificial hip joint. The ability to comprehensively represent the range of motion of the hip joint holds potential contributions to preoperative planning in artificial hip joint replacement surgery and the prevention of dislocation in patients’ postoperative daily activities.