1. If you LOOK UP TO someone, you admire and respect them.
I’ve always looked up to my grandpa and wanted to be like him.
Jeff is a role model for other players to look up to.
2. If you LOOK DOWN ON someone, you think you are better or more important than this person or you think he/she is not good enough for you.
My neighbour looks down on anyone who hasn’t graduated from university.
Don’t look down on her just because she doesn’t wear designer label clothes.