The invention discloses a power distribution automation three-remote function closed-loop test system and method. The system comprises a three-remote test workstation, a three-remote tester, a power distribution automation terminal and a power distribution network automation master station, wherein the three-remote test workstation is used for acquiring three-remote configuration parameter information from the power distribution network automation master station and transmitting generated three-remote test case parameter information to the three-remote tester, the three-remote tester is used for transmitting on-off state information and analog quantity to the power distribution automation terminal, the power distribution automation terminal generates SOE (sequence of event) information after operation, transmits the SOE information to the power distribution network automation master station, the power distribution network automation master station transmits the SOE information to the three-remote test workstation, the power distribution automation terminal transmits the SOE information to the three-remote tester, the three-remote tester transmits the SOE information to the three-remote test workstation, and finally, the three-remote test workstation generates a three-remote test report. Technical requirements for on-site constructors are reduced, on-site installation and commissioning workload is greatly relieved, and maintenance efficiency is improved.