Adrenal mass is a common disease in urologic clinic. For big tumors or tumors with endocrine functions, surgery is still the standard of care. With the development of minimally invasive techniques, the surgical management of adrenal masses has been greatly simplified. Large incisions are replaced and exposure of the surgical field is improved significantly. As more and more patients with adrenal tumors undergoing surgical treatments, new problems arise. Some patients have bilateral tumors requiring surgical removal. Preservation of adrenal gland will prevent long-term hormone replacement therapy. Additionally, some patients hope to preserve as much adrenal gland as possible to improve quality of life. Therefore, the number of partial adrenalectomy has been on the rise.