Justice Peter Underwood said the sex abuse against the girl and two boys - one boy was aged only four when the abuse began - was the worst case of paedophilia he had encountered in more than 18 years on the bench.
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"You persisted in a course of systematic and horrific child abuse for 11 years," Justice Underwood told the man who pleaded guilty to three counts of maintaining a sexual relationship with a young person.
Taking a non-parole period into consideration, the man could be out of jail in six years.
The decision was delivered on the same day as a 45-year-old South Australian man, Brian Francis Beard, was jailed for 11 years following four sex attacks on an eight-year-old girl.
Beard must serve nine years of his sentence before becoming eligible for parole.
In passing sentence on the Hobart man yesterday, Justice Underwood listed the crimes as "rape, incest, unlawful sexual intercourse with a young person, aggravated sexual intercourse with a young person, aggravated sexual assault and indecent assault".
Justice Underwood said the conduct had begun when the man moved into the family home shortly after the death of the children's natural father.
"You repeatedly engaged in all manner of sexual acts including oral intercourse, masturbation by you of this child and by this child of you," he said.
"Not infrequently these sexual acts were carried out in the matrimonial bed with your then common-law wife taking part.
"You persuaded this boy to have intercourse with his mother and on one occasion there was simultaneous sexual activity involving you, your wife, her elder son and his sister."
Justice Underwood then described as "all manner of vile acts" the oral and vaginal sexual intercourse against the girl who was two years younger than the boy.
"These acts occurred on hundreds of occasions, not uncommonly in the company of the girl's mother," Justice Underwood said. He said "the final victim" was the youngest child, a boy aged four when the man first sexually abused him.
"This abuse lasted for eight years and principally consisted of masturbation and oral sexual intercourse," Justice Underwood said.
"A more devastating account of criminal conduct involving sexual abuse of children in complete dereliction of the trust vested in you by virtue of your position in the family cannot be imagined.
"Condign punishment is called for to mark society's abhorrence at your criminal conduct."
Justice Underwood said that the man's sentence would have been "one or two years longer" had the man not pleaded guilty.
"I do take into account the plea of guilty that you entered for the purpose of saving the children from the nightmare of having to give evidence against you in a public court," Justice Underwood said.
The accused received three years' imprisonment on each indictment, the first to date from December 11, 2002, the other two to be served cumulatively, a total of nine years.
A non-parole period of two years on each indictment was handed down.
