WATCH A VIDEO OF THE FINAL NOW supplied by Terry Teeman
World number one Catalano, cousin of Ronnie O'Sullivan, won the event for the fifth time.
Dudley's Catalano, who turned 31 last Wednesday, said: "This one always falls about three days after my birthday. It's great to win it because it's an extra birthday present.
"I could see Emma was playing well and I thought I've got to play well to win it. It was live on the internet and that put a little bit of pressure on us because we're not really used to that.
"Emma didn't play like she had done all day and I did what I needed to do."
Catalano had accounted for three of the four Hong Kong entrants en route to the final.
Leading 2-0 in the last-16, she admitted that Ng On Yee "didn't really give me another shot" as breaks of 65 and 67 forced a decider.
But a run of 76 from a cross double secured a 3-2 victory.
After beating So Man Yan 3-0, Catalano fell 1-0 down to Jaique Ip Wan In and gave herself "a bit of a telling off" before she prevailed 3-1.
Lack of entries had forced the World Ladies Billiards & Snooker Association to cancel the previous two tournaments.
So Catalano was delighted a 17-strong field enabled the Connie Gough to proceed.
"When I knew this one was going ahead, I was like a kid at Christmas," she said. "I was so excited and I couldn't wait to get here.
"I love the game. And even after playing for 15 years, it still absolutely fascinates me."
Meanwhile, Ng did fly home with some silverware. She beat Tina Owen-Sevilton (Bridgwater, Somerset) 2-0 in the Plate final.
Jenny Poulter (Maidstone, Kent) edged Chris Sharpe (Chelmsford) 2-1 for the Seniors title.
This was the fourth and final ranking tournament before the World Championship.
The WLBSA thanked Woking Snooker Centre owner Bob Mason for hosting the event and Terry Teeman for streaming the final.
PRELIM: Ng On Yee (32) beat Jenny Poulter 3-0.
LAST-16: Maria Catalano (76) beat Ng (65, 67) 3-2, So Man Yan beat Eva Palmius 3-0, Marianne Williams beat Gaye Jones 3-0, Jaique Ip Wan In beat Chris Sharpe 3-0, Tatjana Vasiljeva beat Tina Owen-Sevilton 3-1, Yu Ching Ching beat Vicky Carter 3-0, Martina Lumsden beat Michelle Marinova 3-1, Emma Bonney (31) beat Jasmine Bolsover 3-0.
QUARTER-FINALS: Catalano beat So 3-0, Ip Wan In (41) beat Williams 3-0, Yu beat Vasiljeva 3-1, Bonney beat Lumsden 3-0.
SEMI-FINALS (£60): Catalano beat Ip Wan In 3-1, Bonney beat Yu 3-0.
FINAL (£150/£110): Catalano (36, 39) beat Bonney 3-0.
QUARTER-FINALS: Ng On Yee beat Chris Sharpe 2-0, Jenny Poulter beat Michelle Marinova 2-0, Tina Owen-Sevilton beat Jasmine Bolsover 2-1, Eva Palmius beat Vicky Carter (34) 2-1.
SEMI-FINALS: Ng beat Poulter 2-0, Owen-Sevilton beat Palmius 2-0.
FINAL (£30/£20): Ng beat Owen-Sevilton 2-0.
QUARTER-FINALS: Marianne Williams beat Gaye Jones 2-0, Jenny Poulter beat Martina Lumsden 2-1.
SEMI-FINALS: Poulter beat Eva Palmius 2-0, Chris Sharpe beat Williams 2-0.
FINAL: Poulter beat Sharpe 2-1.
Ball by ball scoring and results from tournaments