The bureau said the mastermind of the operation, surnamed Tseng, got the gambling site going last December by taking bets on European football matches.
Tseng employed more than a dozen people who were working in three shifts around the clock.
According to police, the operation provided bank accounts in China or through Alipay for gamblers from China to remit money for their bets.
For winning bets placed by Chinese, the winnings were transferred to bank or Alipay accounts designated by the customers.
The operation also provided round-the-clock online consultation services and recruited people to join through text messages, communication software and the internet.