If I want to learn some professional knowledge about how to appraisal European sword,especially Medieval or Renaissance sword.By the way I wonder how people in the past appraisal swords,is there any antique book about these things?

Sorry I can't help personally but the question is not an overly difficult one. Its possible being a rather pompous forum a lot of those who may be able to help might be put off by your command of English. which is unfortunate.

I apologize, Zhenyu. I believe Michael's question is aimed at the forum, but it is hard to tell at first reading. Your questions and comments are welcome, and your question is easily-enough understood. I can't explain why some questions do not get much response from the forum.

I am not an expert, but you could start by asking antique dealers or an insurance company how to have an appraisal done. Once you find an expert, you could ask them more specific questions. I would also recommend asking at a university library. Larger universities are sure to be able to get you started. With electronic lending, it doesn't necessarily need to be a library near you. Once you identify some books, ask at your local library about inter library loan.

Of course, someone on this forum may respond with more experience.

Good luck!

It's a good question. I would like to know more also. Sword appreciation and appraisal of Japanese swords is fairly developed even in the U.S. Here there are some gatherings where some beginners can learn from experts how to judge and appreciate Japanese swords. And other countries have groups like this also. But there isn't anything like that for Western swords that I know of. Maybe in a few more years? I would love to go to a place like the Park Arms fair in london to see lots of original swords and try to learn about them.