Mahan Beheshti opened the scoring for Iran in the 45th minute.
Iran stayed on top in the second half with Amir Reza Valipoor collecting a long ball and tapping past Chinese Taipei keeper Lin Cheng-En in the 52nd minute with Jafar Asadi then weaving past the Chinese Taipei defense to slot home from close range two minutes later.
Chinese Taipei fell further behind in the 83rd minute with Mohammad Ghasemi lobbing the ball over a surging Lin before Beheshti closed their account in stoppage time from inside the area.