The State Opposition has promised increased oversight of Western Australia's judicial system if it wins the state election.

Opposition leader Mark McGowan says a Labor government would set up a sentencing council, made up of members of the judiciary, police, lawyers and the public to report to parliament on issues of community concern.

Mr McGowan has also promised to introduce a judicial commission to allow members of the public to lodge complaints.

"We need to make sure that judges, who are appointed essentially for life, or until they're 70 years of age, have some form of accountability over the top of them in the same way as other organisations and other people have accountability in our society."