Andrew Hoole and Jamie Maclaren traded goals for the Aussies, with the Jets' forward bagging a hat-trick and Glory's Maclaren adding a brace to his treble against Hong Kong.
Australia led 2-0 at half-time and went on with the job after the break, conceding late - their first in the group - once they were already five goals to the good.
The result means Aurelio Vidmar's side won each of their three matches at the National Stadium in Kaohsiung, scoring 15 goals in the process, with eight different scorers.
The Olyroos will now look forward to January's tournament in Qatar which will see the ten group winners and five best second-placed teams join the hosts, with the top three teams booking a place at the 2016 Rio Olympic Games.
Brimming with confidence following their 6-0 defeat of Hong Kong and 4-0 win over hosts Chinese Taipei, the Olyroos went into the match knowing the result would decide the group.
The Aussies only needed a draw courtesy of their superior goal difference but looked to attack at every opportunity, with a quick counter leading to the opening goal.
Defending a corner Australia's U-23's were clinical in transition, nullifying the threat and taking three passes to unlock their opposition's defence, with Hoole on the end of it to grab his first.
It was an attacking corner that led to the Olyroos' second, this time the ball spilling out to Maclaren on the edge of the box who cracked a shot the keeper could only parry into the back of the net.
A fortuitous strike from Hoole just shy of the hour mark gave the Olyroos their third, the Sky Blues bound forward slipping on the bare surface as he shot from the top of the box but still managing to find a way over Myanmar's helpless goalkeeper.
Maclaren sprung the off-side trap, latching onto a beautiful ball from Mustafa Amini to record his second and the fourth for the night.
Hoole notching his hat-trick and completing the scoring for the Olyroos a minute after with the help of a pin-point cross and some hapless defending from their opposition.
Myanmar pulled a goal back when Kaung Sat Naing was not picked up in the box and fired home from an acute angle but it was scant consolation as the Olyroos ran out convincing winners.
Asia's best and a place at the Rio Games now in their sights.
Australia 5 Hoole 10', Maclaren 13', Hoole 57', Maclaren 68', Hoole 70'
Myanmar 1 Kaung Sat Naing 78'
Olyroos starting XI: John Hall, Scott Galloway, James Donachie, Jackson Irvine, Brad Smith, Steve Ugarkovic, Ryan Edwards, Mustafa Amini, Andrew Hoole, Connor Pain, Jamie Maclaren