In September 1945, following the end of the Japanese occupation, the British Forces appointed a Press Relations Officer to communicate with remaining war correspondents.

The unit was retitled as the Public Relations Office (PRO) when the civilian administration resumed governance of Hong Kong in 1946.

These included the Keep Hong Kong Clean Campaign, which was promoted using the iconic Lap Sap Chung litterbug character designed by ISD officer Arthur Hacker.

[4] Following the 1995 sale of Beaconsfield House to a private developer, the Information Services Department relocated to the nearby Murray Building in 1996.

[10] In April 2023, the ISD banned several government-registered media companies from covering the 2023 National Security Education Day, which was officiated by Xia Baolong.