The Western Australian government is looking at suing the Australian Rugby Union for more than $100 million over the decision to axe the Western Force.

Premier Mark McGowan says the state government is getting legal advice and the options include suing for restitution, which would bankrupt the ARU, or suing for reinstatement.

"I think the ARU doesn't understand exactly what they've done to Western Australia and the amount of money and the amount of support that's been invested in this team," he told ABC radio on Monday.

The premier said $17 million was spent on new headquarters for the Western Force and $120 million for a road safety sponsorship deal.