Similar to a spinal endoscope, an intervertebral foramoscope is a light-equipped tube that enters the intervertebral foramen from the side or side and back of the patient’s body (either in a flat or oblique fashion) and performs the procedure in a safe working triangle. The surgery is performed outside the disc’s fibrous annulus, and the herniated nucleus pulposus, nerve roots, dural sac and hyperplastic bone tissue can be clearly seen under direct endoscopic vision. The herniated tissue is then removed using various types of grasping forceps, the bone is removed microscopically, and the broken fibrous annulus is sealed with radiofrequency electrodes. The method is minimally invasive, with a skin incision of only 7 mm, the size of a soybean grain, minimal bleeding, and only one postoperative stitch. This method is one of the minimally invasive surgical methods for the treatment of lumbar disc herniation with the least trauma to the patient and the best results among similar surgeries. The selection criteria for intervertebral foraminoscopic or endoscopic microdiscectomy are relatively similar to those for laminectomy and disc removal. Patients with herniated discs selected for minimally invasive surgery must exhibit signs and symptoms of nerve root compression and must meet the following conditions: 1. Persistent or recurrent radicular pain. 2. The radicular pain is more severe than the lumbar pain. 3.Ineffective by conservative treatment. 4.No history of substance abuse and psychological disorders. 5.Positive straight leg raise test and difficulty in bending. 6.Imaging, especially CT and/and MRI confirm herniated lumbar disc and the signs and symptoms are consistent with the imaging presentation. Advantages: less trauma, minimal damage to the structures that play an important role in spinal stability, low possibility of postoperative segmental lumbar instability and slippage, fast recovery, with bedtime activities three days after surgery, and a general return to work in half a month to a month. The cost is low, about 40-50% lower compared with the current open surgery.