Britain had already claimed three medals heading into the final day in Gyeongju in the form of Sarah Stevenson's -67kg gold, Jade Jones' -57kg silver and Martin Stamper's -68kg bronze.
Harvey (pictured, left) was already guaranteed to take that to four having won four matches en route the -63kg semi-finals, beating Bulgaria's Vladimir Dalakliev 5-2 in the quarter-finals to do so.
He then downed Vietnam's Le Huynh Chau 10-5 the following day but agonisingly missed out on following Stevenson's lead, missing out on gold 5-2 to home hope Lee Dea-Hoon.
Harvey's efforts are made all the more impressive as, due to Stamper's dominance so far this year in the -68kg, he shed the pounds to earn his place at the worlds in the -63kg.
His bronze medal couldn't be better timed with Britain soon to select the four weight categories for next year's Olympics with results in South Korea sure to cause the selectors a few headaches.
Elsewhere, on the final day Harvey's fellow Brit Bianca Walkden, and world number three, fell to Briseida Acosta Balarezo in the last 16 of the women's +73kg in South Korea.
In the men's +87kg after his first round opponent, Ecuador's David Moreira Vera, was disqualified Mahama Cho fell 9-3 to Jordan's Mohammad Imar.
And a day later kickboxer-turned-taekwondo player Damon Sansum's charge in the -87kg category also fell short of the podium places, losing in the last 16 15-8 to European champion Carlo Molfetta.