It is hard to define what the most advanced technology is, usually because technology gets more advanced every day, plus people find new ways of using technology all the time!
I’d say that scientist at CERN (http://home.cern/about) have built one of the world’s largest science laboratories, as a start. But in my field, we are interested in looking inside the brain in new ways. There are new technologies designed to look at metallic nanoparticles, or using new radiation techniques, or new methods of using light to look inside the brain. All of these are incredibly complicated and very advanced, but in a year, there will be even more advanced technology.
That’s the coolest thing about science – you get to work on projects that push back the bounds of what the most advanced things are all the time!
It’s hard to compare technologies across fields. Each scientific discipline has its own technologies. In my field (genetics and DNA analysis), some of the most exciting technologies are those that are allowing us to study longer and longer strings of DNA. That is facilitating huge advances in understanding genetic variation between individuals and between species. For humans that means it will be faster, and more accurate, to infer if there are genetic reasons for human disease.
To put it in perspective how these technological advances have made a huge change – it cost about $2.7 million ($2,700,000,000) to sequence the human genome. Now, I’m going to use new technology to sequence the Gila monster genome for about $27,000 (or one hundred thousand times cheaper than it cost for the human genome).