Sri Lanka began the tour with a four-wicket victory against Middlesex. They will play three Tests beginning May 26 at Cardiff.
"It's no easy task going up against the best Test team in the world at the moment, they've had a fantastic 18 months," Law, who took over from Trevor Bayliss after the World Cup, was quoted as saying in cricinfo.
"We know we are up against it here but we aren't here to lose. We can match them if we apply ourselves and keep things simple. We can be a devastating team and that's what we are planning to do. We are here to play cricket the way Sri Lanka play cricket and if we do we'll be successful."
Law also made it clear he is looking at a long term relationship with the team. "At this stage it's a wonderful opportunity to work with one of the best teams in the world so, yes, I am keen," he said. "I've got this tour to show what I'm capable of."
Although Sri Lanka have never won a full Test series in England they have embarrassed the hosts before, notably at The Oval in 1998 and again at Trent Bridge in 2006 when they levelled the series.
