Jetsada Chudech opened the scoring in the fifth minute for Thailand, who has taken part in the World Cup for five consecutive years.
Five minutes later, Apiwat Chaemcharoen doubled the score for the Thai team.
Then in the 12th minute Jetsada Chudech raised the score to 3-0 for Thailand.
Before the first half closed, striker Suphawut Thueanklang continued the thrashing, scoring two more goals in the 17th and 18th minute.
And two additional goals from Suphawut and another from Jirawat Sornwichian in the second half concluded the overwhelming victory.
Earlier, Vietnam beat Japan in the event's quarter-finals to earn a ticket for the first time to the 2016 FIFA Futsal World Cup.
The Vietnam team jumped two spots to 44th in the latest futsal world rankings on the back of their win over Japan.
Japan dropped from the 9th to 12th spot following both losses to Vietnam and Kyrgyzstan.
Spain topped the futsal world rankings, while second and third places were occupied by Brazil and Russia, respectively.
