This study is a multicenter, prospective registration study that will follow up patients with clinically confirmed and suspected amyotrophic lateral sclerosis for a period of 2 years. A total of 1000 patients will be included to dynamically observe the changes in clinical symptoms and signs, imaging, electrophysiology, biomarkers, biological samples and so on, which will construct a genetic profile of ALS in China, explore the etiology and pathogenesis, and establish an iPSCs library, provide a basis for finding treatment targets.