Winger Shannon Izar did the damage for France, completing a hat-trick by the 25th minute as the world No.4 side took a 29-0 lead into halftime.
Australia’s attack was repeatedly undone by turnovers while the opposition benefited from the dominance of their forwards, who completed 16 offloads to two.
Inside centre Chloe Pelle picked up a doubled, while French flanker Romane Menager was named player of the match.
Ireland and France are both undefeated after the home side saw off the last-placed pool C side Japan 24-14 on Sunday.
Four-time champions New Zealand are top of pool A after trouncing Hong Kong 121-0, while Canada are also undefeated thanks to a 15-0 win over Wales.
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Defenders England beat Italy 56-13 in pool B, while the USA claimed a 43-0 win over Spain.
The top-four seeded teams go through to the semi-finals.