I was just wondering if there is any way to know who voted(up/down/favorite) on your question/answer.
just wanna know if possible.
There's a few reasons for that - to prevent revenge/antirevenge voting for examples. To a limited extent mods will be informed of unusual voting patterns (though in most cases this is automated), but there's no way at all for a user to know, without a comment made by the voter of who voted on a specific question question.
No there is no way to know. Not even moderators have access to that information.