I'm going to Beijing in next Month and i'd like to know if there is any plce to practice skating in ice, or snowboarding, nearby the city.

Yes, there is. I recommend the Nanshan Ski Resort to you and it is not that expensive. For the price, you can find through this link:
http://www.nanshanski.com/web_en/Content_chanpin.Asp?ID=64
A shuttle bus can be taken at Sanyuanqiao/Wudaokou in the city at 08:30 to the Ski Resort directly and it is back at 17:30. You need to reserve a seat in advance. Here is the number for your convenience:
010-89091909