Joint operations this year led to the arrest of 532 Chinese citizens, 284 Taiwanese citizens, and 12 citizens of South-east Asian nations, the Ministry of Public Security reported on its website.
Those arrested included 45 Chinese suspects who were repatriated from Indonesia, the ministry said.
Other arrests were made in Thailand, Vietnam, Cambodia, Laos, the Philippines, Malaysia and Singapore.
The police raided 162 properties used by the gangs and handled more than 1,800 cases of fraud, the report said.
The gangs mainly targeted residents of Taiwan and China, but one group had set up a network that also operated across Thailand, Vietnam, Indonesia and the Philippines, it said.