I have a website that have contents mainly on various opportunity announcement news, like scholarship, internship, training, fellowship etc. These information related with development professionals. So I collect information from various websites (original site/organization own site where it publish) and copy the information and publish it in my site (To accumulate all related info in one site). I also mentioned the original organization's site name and link in my post. This is not steel the article from other website where as many website ask to spreed their announcement/information so that people able to know it. Is it violation of Adsense rules? Our Adsense account will be banned??
Yes it is a violation and you will most likely be banned, you need unique content, not content taken from other sites, if you bothered to read the guidelines you would know this. Mentioning the original link will not help you in any way, if you can't come up with something original of your own your site will be a pointless pile of crap.