Ramsey was sold to Newcastle last weekend for a guaranteed £39million in a deal largely motivated by Villa’s need to comply with Uefa’s spending regulations.
The transfer prompted an outpouring of messages from team-mates, with senior players including Tyrone Mings and John McGinn appearing to take aim at the rules.
Ramsey is the latest academy player to be sold by Villa, with the money received from the transfer registration as pure profit in the club’s accounts.
Captain McGinn wrote: “A sad day losing a top player and person and one of our own but it seems to be the way football is set up these days!”
Speaking on Friday, Emery said he agreed with the sentiment in the players’ messages but said the club now needed to move on.
He said: “I agree with the players, with the same message they sent. I agree but we have to move on and try to get our best.
“Of course, they are the same. They are friends and maybe they can feel a little bit sad.
“In football you have to move on and keep going. They are sending messages in the same direction and I agree.”
Villa’s transfer business has been severely restricted as they seek to comply with the terms of a settlement reached with Uefa, after they were fined £9.5million for a previous breach of the rules.
Emery continued: “We have to accept the financial rules. We know it and we are trying to get a balance between the rules and our capacity to keep improving and getting better.”
Ramsey is one of 12 senior players to have left this summer, with goalkeeper Marco Bizot and forward Evann Guessand the only two arrivals so far.
Emery wants to add up to three new players, including a defender and an attacker, before the September 1 deadline but the budget remains tight with loan deals the most likely.
The boss said: “There are always three circumstances, one is the club, the second is the team, then there are the player’s wishes.
“Those three circumstances, if there are two, it is getting the objective.
“We did everything linking those three circumstances, with the players and those who are leaving.
“Always we are accepting and trying to do our best for the club and the team we are building.”