The invention provides a system and method for quickly inquiring a power supply area of a distribution network system. The system and the method for quickly inquiring the power supply area of the distribution network system provide accurate and reliable, convenient and efficient basic query data for emergency repair commanders of a distribution network, shorten the customer outage time, and guarantee the fault repair quality. The method specifically comprises the following steps of inquiring the corresponding power supply area in a database according to an inputted fault address, and displaying the power supply area; according to the inputted fault address; inquiring a corresponding substation jurisdiction line in the database, and displaying the substation jurisdiction line; and associating the fault address with the corresponding power supply area, and associating the fault address with the corresponding substation jurisdiction line by the database.