The agency scooped an impressive eight trophies in six categories including long-term effectiveness, FMCG, brand activation and social responsibility communications.
Callegari Berville Grey won the Long-Term Effectiveness Award for P&G Boss Bottled "Dressing ritual" campaign, which has been a top five fragrance in Germany and France for more than six years, surpassing its target to remain in the top 10.
The agency also won silver for P&G Boss "Range" campaign, which boosted share level in France from 10.4% at the end of November last year up to 14% on Christmas Eve.
Grey London won the bronze for P&G Pantene Pro-V Colour Expressions "Setting colour alight" campaign, which became a top three brand in the UK and Germany in under a year.
The London agency also won the Socially Responsible 北京赛车pk10 Award 2007 for Women's Aid "Valentine's day: saying it with roses" campaign.
Further bronze awards were awarded to Grey Brussels, Grey Madrid and Grey Dusseldorf.
Since 2005, Grey EMEA has landed a total of 22 Euro Effie awards including 10 awards for P&G, three for Seat and two for GlaxoSmithKline.
The competition is organised by the European Association of Communication Agencies and aims to celebrate proven communications effectiveness across Europe.
Carolyn Carter, president and CEO of Grey Group EMEA, said: "We are enormously proud of this award. This is an outstanding tribute to our agencies and our brand-building partnership with clients."
Dominic Lyle, director general at EACA, said: "Grey has achieved what no other agency network has accomplished since the launch of the Euro Effies -- it has landed the coveted Agency Network of the Year Award three years running."
Wieden & Kennedy Amsterdam received the Grand Prix and Gold for Nike Women's Dance campaign 2006 "Tell me I'm not an athlete". Other Gold winners were 180 Amsterdam with "adidas +10" and kempertrautman GmbH for Audi Q7 launch campaign.
Silver awards went to Leo Burnett London for Max Factor Masterpiece Mascara "Beautifully framed eyes" and McCann World Group for Xbox "Gears of war". Bronze awards were won by Leo Burnett Bucharest and London, TBWA\Germany, Draftfcb Deutschland and Cayenne Communications.