A demoralised Down will have much to work on as they look ahead to the qualifiers. Monaghan march on to the semi-finals and a meeting with the winners of next Sunday's encounter between Donegal or Fermanagh. We'll be back for extensive coverage of the Ballybofey showdown. See you then.
Monaghan manager Malachy O'Rourke said: "Down were lively in the first quarter but as the first half went on we got to grips with them.
"We wanted more urgency and that's what we saw in the second half. When we got on top we exploited gaps. It's a work in progress but I'm delighted to get through.
BBC Sport NI punditQuote Message: Monaghan just walked through us in the second half. Some of it is inexcusable - just switching off and letting the score blow out.
BBC Sport NI punditQuote Message: The scoreboard tells two teams moving in totally different directions.
Monaghan keeper Rory Beggan has enjoyed a good day between the sticks and he keeps out Donal O'Hare's shot before Farney substitute Dick Clerkin rattles one over. The final whistle is blown and while Monaghan were superb in the second half, Down were dismal.
Conor McManus adds to his tally. There's five minutes of added time
Rory Beggan finds the target from a 45 and seconds later Daniel McKenna increases the Down pain
A cool finish from Monaghan forward Owen Duffy, slipping the ball past Keeper Stephen Kane with four minutes left
Donal O'Hare scores again with a free but it is cancelled out by Farney substitute Daniel McKenna
Conor McManus makes it look so easy as he slips over a free before Donal O'Hare scores just a second point in the half for Down
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Rory Beggan's free is followed by a Kieran Hughes goal - the big foward swivelling to volley into the corner of the Mourne net
Conor McCarthy and Rory Beggan fire over frees and it's now an eight-point advantage for the hosts
Conor McCarthy finishes a flowing Monaghan move by fisting over - Down need to get back into this soon
Conor McManus scores his first point from play and it's a beauty, arrowing over from long range. Karl O'Connell follows up with another Farney point
Mourne midfielder Peter Turley makes his exit after picking up a black card for hauling down Darren Hughes