Hello , i used to do some photos for catalogues in my country. And now im searching for this kind of work here,does anyone know some serious agencies?

I suggest you look for photographers and ask them the question. I dont think the advertising industry has much of a foot print in Switzerland. You might consider some unlikely avenues for information too. I know Vevey (up the road from you) has a photographic museum, might be a place you could look for leads.

You probably have to look for an agency which represent photographers...

I know some model agencies in Zuerich, although it's not really what you're asking for and not in your region, they might be able to help you further:

http://www.option-model.com/
http://www.time-model.com/