Survey papers for PDE? I want to know if there is a good website which allows you to download survey papers on PDEs? The "survey" should include a summary of methods, skills, developments etc. I wish to get some basic (or common) conceptual ideas and methodology in the macroscopic view, as well as details. I think it can help me to understand the theory of PDEs and let me know how to do research in the field of PDEs? Any recommendation would be appreciated! ^_^

I think you should have a look at Sergiu Klainerman's 30-page article in the Princeton Companion to Mathematics. It's a recent and well-written overview-like treatment of PDEs.

There is also an extended version of the article to be found on Klainerman's website.