The application discloses a user-side leakage current monitoring method and system. The method comprises: leakage current information on a user side is collected; when the size of the leakage current is greater than a preset threshold, warning information is generated; the leakage current information and the warning information are collected and uploaded to a main station; and according to the leakage current information and the warning information, a potential fault point is located. The system comprises: a collector for collecting the leakage current information on the user side; a warning device for generating the warning information when the size of the leakage current is greater than the preset threshold; an uploading device for collecting the leakage current information and the warning information and uploading the leakage current information and the warning information to the main station; and a locating device used for locating the potential fault point according to the leakage current information and the warning information. The system can collect real-time user-side leakage current data and quickly locate the leakage fault point, reduces the time for looking for the fault point, reduces the time of labor and power failure, and improves the satisfaction of people.