It is responsible for tasks related to maintaining national security and investigating major crimes.

Additionally, there are mobile workstations in four regions: northern, central, southern, and eastern, which serve as specialized case-handling units.

After the victory in the Second Sino-Japanese War, on April 17, 1947, the Kuomintang Central Executive Committee decided to dissolve the Zhongtong Bureau.

Its primary tasks are maintaining national security and investigating major crimes, including the prevention of treason and espionage.

It also protects state secrets; collaborates with the National Security Bureau and the Ministry of National Defense to counter information warfare and cognitive warfare from abroad (with the Ministry of Foreign Affairs and the Mainland Affairs Council handling external affairs, while the Investigation Bureau works with the Ministry of Digital Affairs to track domestic collaborators and useful idiots); it is also responsible for anti-corruption, election bribery investigations, internal security investigations, and the prevention of illegal firearms, drugs, organized crime, Humbug, and money laundering.

Additionally, the bureau offers public services such as DNA and family relationship testing,[5] and the verification of burned or damaged banknotes,[6][7] as well as identifying counterfeit currency and alcohol to trace sources of counterfeit money and fake alcohol.

After its official inauguration by President Chen Shui-bian on December 26 of the same year, it became Taiwan’s first digital forensics laboratory.