I think my husband is very high temper person. He just hit the car at home and complaint a lot toward my dad. How should I do?

I suggest that first, extend more patience and understanding towards him. Second, try to look into details. Ask him subtle questions that can help you figure out why he is acting the way he does. Maybe a simple "how was your day at work?" or "did you enjoy bonding the kids?" Sometimes, these simple conversations can lead to a serious one wherein you can find possible problems which can help you avoid or solve in advance.