Given the emergency rule, the government is setting up ad hoc committees to steer the stringent measures against the COVID-19 pandemic, according to the prime minister.
Nevertheless, no curfew has been declared yet.
On Tuesday, 106 new cases of COVID-19 infection were reported in Thailand, making a total of 827, including four fatalities.
The prime minister said the emergency decree will empower authorities to impose curfews, ban travels, and close down buildings without warrants.
Security officers will also have the power to censor and shut down media if deemed necessary.