1. A method for determining user-interested information using a wearable device, comprising: receiving, by an electrocardiography (ECG) sensor associated with the wearable device, an ECG signal of a user; determining a feature set for the ECG signal, wherein the feature set comprises time-domain feature data of the ECG signal and frequency-domain feature data of the ECG signal; and determining the user-interested information based on similarity between the feature set and reference feature sets indicative of the user-interested information, wherein the user-interested information comprises health information associated with a disease.