Party-goers who catch a train home early tomorrow morning will have their every move recorded by about 5500 closed circuit television cameras installed across the Queensland Rail network.

The cameras are installed on train carriages, at railway stations and in carparks and offer 24-hour surveillance.

State Transport Minister John Mickel used New Year's Eve to remind the community of QR's security presence, which is set to increase further.

"CCTV will operate in all Citytrain stations and sealed car parks within 18 months," Mr Mickel said.

The network's security regime is also being beefed up through a conversion to digital technology.

Mr Mickel said almost $10 million had been allocated to upgrade the network's CCTV cameras from analogue to state-of-the-art digital and would be completed by 2010.

The new system would give security officers and police a better quality picture and more storage space, according to QR passenger services security manager David Bell.

"It's a better picture, it's easier to process, once we have the footage we don't have to worry about tapes, we're working off hard drives and we're working off disks," Mr Bell said.

Mr Mickel said the system could already be credited with delivering the rail network a crime rate much lower than in the general community.

"Assaults on the network account for only two to three per cent of such offences throughout the entire area surrounding the network," he said.

"Serious crime on the network has not climbed in recent years despite considerable patronage growth."