With the development of three-dimensional (3D) measurement technology, how to quickly and accurately measure the 3D shape of large scene objects has become a research hotspot. This study improves the phase measurement profilometry, uses an improved phase calculation method for measuring the 3D information of the object, and combined with the amplitude information, the problem that the phase measurement profilometry can only measure the surface information, but can not accurately measure the position of the object is solved. Our proposed method can suitably measure the 3D information of each object in a large scene. The experimental results show that the proposed method is simple in principle and is good for measuring discontinuous objects. Furthermore, it not only determines object position but also measures the 3D information on the surface of the object.