The invention is applicable to the technical field of electricity utilization information acquisition, and provides a court low-voltage identification method and device, and terminal equipment. The method comprises the following steps of acquiring user low-voltage events reported by an intelligent electric energy meter in a target court, and according to the grades of the user low-voltage events and the number of the user low-voltage events, grading court low-voltage events of the target court; acquiring transformer data of the target court, and determining a low-voltage cause of the target court according to the transformer data; and sending a court low-voltage event grading result and the low-voltage cause of the target court, as a low-voltage identification result of the target court, to a master station end, so that the master station end displays the low-voltage identification result. The low-voltage identification result is acquired, so that an important basis is provided for a maintenance sequence of subsequent operation and maintenance personnel, the low-voltage problem positioning time can be shortened, the on-site operation and maintenance workload of the operation and maintenance personnel can be reduced, and the power supply service quality of a power supply company is improved.