Our dev environment has been down for a week. We can not get into dev environment at all. Admin still could not figure what is wrong with it. In the meantime, is it possible for us to transfer existing reports from dev to test. Maybe through logs or something.
No, all your content is stored in the dev content store database.
If you can temporarily attach your dev content store database to another environment you can then export what you need.
Easiest is a temporary isolated cognos install, and then attach the copied content store.