The goal of orbital mass surgery is the complete removal of the orbital mass by surgical means, which requires a surgical pathway (access) through which the mass is transported. A surgical procedure can be evaluated in two ways: outcome and complications. The ideal goal of orbital mass surgery is to minimize the damage to normal ocular vital tissues while removing the mass completely, and to achieve this goal, a precise surgical treatment plan and the selection of the best optimized surgical plan are required. The best optimized surgical plan is: the best position and size of skin incision, the best position and size of bone resection, the shortest and most direct surgical path, the protection of important tissues and structures in the surgical path and avoidance of damage, and so on. To achieve a precise surgical treatment plan and the optimization of the best surgical plan, it must be based on accurate and informative preoperative design and simulation, which is difficult to achieve with traditional surgical methods, and the development of computer-aided design technology and image processing technology, as well as a variety of imaging techniques, has made precise preoperative design and simulation of orbital masses possible. This new technique has two meanings: first, the chosen method is the best method, which has been optimized and screened among many possible paths; second, this method is the most precise method, with an accuracy of millimeters. By applying this technique, we can determine before surgery the location and size of the surgical skin incision, the layers of various soft tissues, the location and size of the bone block to be removed, what important tissue structures need to be protected in the surgical path, and so on. After years of clinical practice, this method has proved to be clinically effective in the treatment of orbital masses, especially in the surgical treatment of complex orbital masses, which significantly improves the therapeutic effect, avoids the damage of important tissues of the eye, minimizes the postoperative skin scars, recovers faster, and avoids the emergence of a number of complications compared with the traditional treatment methods.