The raid on June 26 was the biggest arrest this year, the Immigration agency said.
Bali immigration director Saffar Muhammad Godam told reporters authorities would soon deport the Taiwan passport holders after arresting them in a sting operation at a villa in Bali's Tabanan district.
"The 103 foreign nationals stayed at the villa and conducted suspicious activities, which we suspect are activities related to cyber crime activities," he said, presenting laptops and routers at the press conference.
Those arrested were also suspected of misusing their visas, he added.
Reuters could not immediately contact legal representatives of the Taiwan passport holders.
Godam said the scam was targeting people from overseas and not Indonesians.
