Thailand reached the quarter-finals of the Sudirman Cup in Finland after beating the hosts 5-0 on Monday.
Having defeated India in their opening Group A match, the Thais had few problems against Finland in the mixed team world championship in Vantaa.
Thailand, who rested several key players against Finland, will meet China in their final Group A match on Wednesday.
It is a meaningless encounter as both have already qualified for the knockout round and the quarter-final match-ups will be determined by drawing lots.
The quarter-finals are scheduled for Friday, the semi-finals on Saturday and the final on Sunday.
In Monday's action, Thailand's Supak Jomkoh and Supissara defeated Anton Kaisti and Jenny Nystrom 21-15, 21-14 in the mixed doubles.
In the men's singles, Thailand's Kantaphon Wangcharoen beat Joakim Oldorff 21-14, 21-14.
In the women's singles, Thailand's Phittayaporn Chaiwan finished off Nella Nyqvist 21-6, 21-6.
Thailand's men's doubles duo Natthapat Trinkajee and Tanupat Viriyangkura beat Anton Kaisti and Jesper Pual 21-15, 21-12.
In the women's doubles, Thailand's Puttita Supajirakul and Sapsiree Taerattanachai defeated Mathilda Lindholm and Jenny Nystrom 21-10, 21-7.
In Monday's other Group A match, China thrashed India 5-0 with both India and Finland eliminated after two losses.
The Thais are without their top singles player, Ratchanok Intanon, whose mother passed away recently.