Would like to totally disable alarm system

How can i totally disconnect the alarm system? I want to do this because its always going off at random moments for no reason. Any ideas?

What year Volvo? It should be easy on a 1970 and may be impossible on a 2009

"its always going off at random moments for no reason. " I beg to differ. There is a reason, you just have not yet found it. What have you checked so far?