A power-outputting management method includes following steps. When a plurality of power-supplying apparatuses are in a working interval, if an output power ratio of the power-supplying apparatus in a working status is less than an output power ratio standard, at least one of the power-supplying apparatuses in the working status is turned off, so that the output power ratio of the power-supplying apparatus in the working status increases and meets the output power ratio standard. When the power-supplying apparatuses are in the working interval, if the output power ratio of the power-supplying apparatus in the working status meets the output power ratio standard, a power capping of the power-supplying apparatuses is set based on an actual power consumption of an electronic apparatus.