 This study is a prospective multi-centre observational single-arm clinical trial, aiming to investigating the efficacy and safety of low profile visualized intraluminal support LVIS stents combined with coils for the treatment of unruptured intracranial saccular aneurysms. As the protocol, clinical follow-up at 30 days 7 days after procedure, DSA or MRA follow-up at 6 months 30 days after procedure, and clinical follow-up at 1 year 30 days after procedure was conducted for each patient. The primary end-points include major adverse events cerebral infarct and death in 30 days post-procedure, complete occlusion rate at 6 months 18030d follow-up. The secondary end-points were immediate technical success successful device placement rate, immediate complete occlusion rate, recurrence rate at 6 months 18030d follow-up and in-stent stenosis or obliteration rate at 6 months 18030d follow-up. Duration of this study is 2 years. 