Embodiments of the present specification disclose data monitoring methods, apparatuses, electronic devices, and computer readable storage media. In an embodiment, a method comprising: receiving, from a network device, data at a frequency range higher than a predetermined frequency; determining whether the data belongs to a currently monitored data interval; in response to determining that the data does not belong to the currently monitored data interval, determining whether the data belongs to an abnormal data interval of a plurality of abnormal data intervals; in response to determining that the data belongs to the abnormal data interval, updating the abnormal data interval based on the data; and updating the currently monitored data interval to be the abnormal data interval in response to determining that the abnormal data interval satisfies a predetermined condition.