Pol Maj Gen Pisit, an adviser to the Information and Communications Technology Ministry, said the military had informed him that Mr Sombat would be taken to the TCSD on Wendesday for questioning. He allegedly posted false information on the social media in violation of Section 14 (2) of the Computer Act.
Mr Sombat would also face two other charges - inciting public unrest and defying the summons of the National Council for Peace and Order.
After questioning, Mr Sombat would be sent back for indictement in the military court, Pol Maj Gen Pisit said.
Mr Sombat was arrested at a friend's house in Phan Thong district of Chon Buri province on June 5 and has been held in military custody since, attending classes to "fine-tune" his attitude.