Visitors to Optus Stadium could be monitored by hi-tech facial recognition cameras, a parliamentary counterterrorism inquiry in Perth was told on Wednesday.

Perth's new $1.6 billion venue just east of the Perth CBD has attracted worldwide attention since opening last month, and is widely promoted as the 'best stadium in the southern hemisphere'.

The inquiry has heard facial recognition cameras could be in place at Optus Stadium. Credit:AAP/Richard Wainwright

Stadium manager VenuesWest, which handles some of Western Australia's biggest government-owned entertainment venues, said the facial ID technology could easily be enabled with existing infrastructure at the 60,000-seat venue.

But VenuesWest chief executive David Etherton was accused by some inquiry members for not providing WA Parliament with the venue's emergency management response plans, which cover a possible terrorist event.