The invention provides an operation and maintenance index anomaly evaluation method, device and equipment. The method comprises the following steps: establishing probability distribution of an abnormal deviation sequence and an abnormal duration sequence of the operation and maintenance KPI according to a
time sequence of the operation and maintenance KPI obtained in real time; respectively determining an abnormal deviation probability value and an abnormal duration probability value according to the probability distribution of the abnormal deviation sequence and the abnormal duration sequence of the operation and maintenance KPI; according to the abnormal deviation probability value and the abnormal duration probability value, determining an abnormal
score based on a preset abnormal
scoring algorithm; and determining an alarm level according to the abnormal
score and a preset corresponding relationship between the abnormal
score and the alarm level, and generating an alarm. According to the method, the overall trend on the
time sequence of the operation and maintenance KPI can be reflected, the difference between the abnormal values on the
time sequence of the operation and maintenance KPI can be reflected, the obtained abnormal score can better reflect the abnormal information of a real fault, and high-level false alarms are avoided or reduced.