Under the user name "Thaksinlive", Thaksin, who is now in Dubai, will officially launch his real-time chat today. His first subject on the online networks is a suggestion to the Abhisit Vejjajiva government on how to tackle the type-A (H1N1) flu epidemic, Thaksin's former legal advisor Noppadon Pattama said.
He already has 651 friends on Facebook and 587 on Twitter.
He posted on Twitter, telling his fans to expect a surprise on July 26, his 60th birthday.
Noppadon said Thaksin and his supporters had been restricted from communicating and this would enable him to speak to them directly.
"Thaksin will accept everybody on the networks. Those who want to wish him a happy birthday can do it on Facebook or Twitter," Noppadon said.
Prime Minister Abhisit was there first, having been registered on Hi5 for years before he became PM. He also has an account on Facebook and one on Twitter.