The invention discloses a method for judging low energy supply flow, and the method comprises the steps of: judging any data collected independently of all branch lines of the same main line for energy delivery by the main station of the energy metering management system; and determining that the energy supply flow is too low when the energy supply intensity values of all branch line metering devices are not lower than the energy supply intensity threshold value, and are not higher than 90% of the standard energy supply intensity value, when the metering device energy supply flow of at least one branch line in all branch line metering devices is less than 0.5% of the standard energy supply flow, and when the metering device energy supply flow of at least one branch line in all branch linemetering devices is not smaller than 10% of the standard energy supply flow.