Ulcerative colitis is characterized by the alternation of recurrence and remission of mucosal inflammation.Both its diagnosis and efficacy evaluation require the combination of clinical,laboratory examination,endoscopy,and histology.Therefore,evaluation scales are important for ulcerative colitis.Many different scales have been developed to accompany the escalation of therapeutic goals from clinical remission and mucosal healing to histological remission.This article summarized the current commonly used scales from multiple perspectives,including clinical evaluation,endoscopic evaluation,histological evaluation,and patient-reported assessment,which aimed to help clinical practitioners understand the advantages and disadvantages of different scales more comprehensively and choose more appropriate assessment method.