McCaw, who finished second behind his national team-mate Dan Carter last year, proved a comfortable winner after votes were collected from the eight national players' associations.
McCaw said: "It is special to be acknowledged by your peers, and I am really grateful for that. The All Blacks have had a good season, and my team-mates are part of this award too."
As for the team award, All Blacks head coach Graham Henry added: "We have a special group of players in the All Blacks right now and they are all working for each other, which gives us a great strength as a team."
The Tri-Nations champions conclude their European tour against Wales in Cardiff on Saturday, having already beaten France twice and England so far this month.