The 29-year-old Inter Milan striker crowned a year of unprecedented club success with the award, handed to him in Cairo on Monday as he finished ahead of perennial rival Didier Drogba of Ivory Coast and Ghana's Asamoah Gyan in the polling.
The Cameroon captain has now achieved more honours and won more major medals than any other of the continent's players but is reluctant to accept he might be Africa's best ever.
"That would be impossible to say. To win the Footballer of the Year four times is to create a new record but I don't think it gives me the right to say I am the best," he told Reuters in Cairo after accepting his award.
"There were greats in previous generations who had different challenges and situations to me. You can't really compare the times.
"Now there are youngsters who are climbing the ladder of success behind me and who are coming up really fast. Who is to say who is the best?"
But there is a case to be made that Eto'o's achievements are unsurpassed by any of the other top footballers to emerge from Africa.
Monday's award beat Abedi Pele's trio of successive African Footballer of the Year accolades in the early 1990s.
At international level, Eto'o has competed at three World Cup finals, captaining his country at this year's tournament in South Africa.
At Barcelona, he won two UEFA Champions League winners medals and scored in both the 2006 and 2009 finals, and was victorious again in May's final with new club Inter Milan. With both teams he won domestic league and cup honours too.
The baby-faced Eto'o's exceptional speed and finishing ability have set him apart from many of his contemporaries.
Eto'o's achievements also easily outshine current rival Drogba but he must still match the 1995 achievement of Liberian George Weah, the only African ever crowned World Player of the Year.
"These honours are not something that you seek out but when they come they give great pleasure. And they motivate too," Eto'o said.
