A method for displaying remaining battery capacity of an electronic device includes calculating remaining capacity of the battery for a number of predetermined times during a preset interval when a first difference value is greater than a predetermined value. The first difference value is between a first remaining capacity and a second remaining capacity. The first remaining capacity of the electronic device is recorded before turning off the electronic device, and the second remaining capacity of the electronic device after turning on the electronic device. The latest calculated remaining capacity during the preset interval is displayed on the display device when a second difference between each calculated remaining capacity and the first remaining capacity is greater than the predetermined value.