What is the requirement to get a tourist visa in germany?

That very much depends on your own nationality! From many countries, you don't need a visum for vacation. You can check the requirements here: http://germany.visahq.com/ On top of the page, you can choose your nationality and where you live.

Tourist visit to Germany – fully completed application form and required declaration – two passport photographs – valid national passport ( valid at least three months. It should also contain at least two empty pages where the visa can be inserted ) and one copy – original of valid US alien registration card or valid US resident visa (type A, E, F, G, H, I, J, L, O, R) and one copy – your current bank statement and one copy – confirmation letter from your health insurance stating coverage with a minimum of $50,000.- (USD) for trips outside the US and one copy – reference letter from your employer – proof of group travel/hotel reservation/airline reservation and one copy – visa fees