Government stimulus measures as well as post-flood rehabilitation and disaster prevention spending will drive the recovery, she told representatives from the US-ASEAN business council.
Last month her finance minister Kittiratt Na-Ranong said the kingdom's gross domestic product (GDP) could grow by 7.0 percent in 2012.
The months-long floods took a heavy toll on Thailand's industrial heartland north of Bangkok, with many factories forced to close temporarily.
Thai GDP shrank 10.7 percent in October-December of last year from the previous quarter, official figures showed last month.
For the whole of 2011, Thailand's economy expanded by 0.1 percent, after an increase of 7.8 percent in 2010, the figures showed.