Motorists will use a phone app to pay for parking and cameras will detect infringements in a plan to replace the parliamentary triangle's ticket machines.
The government agency in charge of car parks across Canberra's centre will discard with its pay-and-display machines.
Drivers would no longer have to make trips back to the car to leave tickets on the dashboard after paying.
A phone app would let them pay for their parking on an hourly, daily, weekly or monthly basis as the National Capital Authority looks to remove 171 old ticket machines.
Motorists not using the app would enter their number plates when paying at 123 new pay-by-plate machines, but wouldn't have to display a ticket afterwards.
The phone app would be a first for the National Capital Authority after it introduced paid parking in 2014 for 9000 spaces through Parkes, Barton, Russell and Acton.
Parking officers would detect infringements using cameras mounted on their vehicles and recognising number plates.
The authority is looking for a contractor to remove its old ticket machines and install their replacements across its parking areas before the end of May.
About half of the new machines would accept cash and credit cards, and the rest would take credit cards only.
A spokeswoman said the technology would improve its customer service, save time for motorists and be better for the environment.
"There will be a reduction in the number of meters required and will no longer issue tickets resulting in reduction of resources and consumables," she said.
The National Capital Authority decided to roll out the new technology as it approached a 2019-20 expiry for its parking management contracts.
Information captured by the number plate recognition technology would be collected, stored or used according to restrictions in national privacy laws, the spokeswoman said.
Workers and visitors in Canberra's parliamentary triangle began paying for parking as the National Capital Authority tried to increase the number of spaces available to visitors to national institutions, including the National Gallery, National Portrait Gallery, Old Parliament House and Questacon.
Studies had found out of area commuters had caused parking demand leading to informal and illegal parking, fewer parking facilities for visitors, and difficulty for commuters finding available parking spaces.
Parking fees in National Capital Authority-controlled car parks increased last year by up to 50 cents, raising the cost of all day parking to $14.50. The hourly rate grew by 20 cents an hour to $3.10.