Robert Andrusiow, 50, was charged with accessing and possessing child pornography after Australian Federal Police officers raided his home and found thousands of illicit images.

He will be sentenced in the District Court. Andrusiow was arrested as part of a nationwide crackdown on child pornography called Operation Centurion.

Images and videos found stored on CDs in his garage and on his computer hard drive showed children from toddlers to teenagers - ranging from glamour shots to hard-core pornography.

Police said the images included boys and girls in various states of undress involved in sexual acts with adults and other children.

Andrusiow's computer contained files marked "lol" for Lolita and "HC" for hard-core. During the raid, he phoned his wife and said: "It was like a compulsion" and "I could not stop".

Andrusiow faces sentencing in Wollongong District Court on November 28.