Inclusion Criteria:  Single intracranial anterior circulation aneurysm diagnosed by CTA or DSA CT showed that subarachnoid hemorrhage originated from the rupture of the aneurysm and was confirmed during operation No indication of decompressive craniectomy (Hunt-Hess grade ≤ 4, Glasgow Coma Scale ≥ 7, no brain herniation; CT showed midline displacement < 5mm) The aneurysm is suitable for both endovascular treatment and microsurgical clipping  Exclusion Criteria:  The patients and their families did not agree to join the study Patients with unruptured anterior circulation aneurysms Patients with posterior circulation aneurysms Patients with multiple intracranial aneurysms Those who cannot receive treatment due to serious concomitant diseases