Western Australia's science education centre Scitech will be relocated to the Perth Cultural Centre alongside the new WA Museum, the State Government has confirmed.

It comes after the Government axed a promise made before the last state election to move Scitech to Burswood alongside the new Perth Stadium.

The Burswood move was scrapped because Scitech preferred a location closer to the city and central to public transport.

It is now set to remain in its current West Perth location until 2021, before being shifted to a new "modern, digitally driven, state-of-the-art" space at the cultural centre in the city.

The announcement comes after the Government last month revealed the design of the new WA Museum, set to open in the cultural centre in 2020.

"A reinvigorated cultural centre will highlight the importance of science, technology, engineering, the arts, and mathematics to the community," Premier Colin Barnett said.

"Scitech is a natural fit for the cultural centre, working closely with the new museum and also at the $17 million upgrade of the museum's Welshpool facilities, where opportunities to share storage and exhibition development facilities will be explored."

Mr Barnett flagged the likelihood of Scitech being co-located with the new museum during a budget estimates hearing last year, and said the Government had pledged $15 million to aid a move.

Scitech is a not-for-profit organisation supported by WA Government funding which hosts a collection of science exhibits for the general public and school groups.