how do you deal with husband who keep moaning all the time?

There's no way to go about it but sitting him down and talking about what causes it. His moaning is a sign of discontent, and it may stem from different things (financial, personal, etc.). It is important that you each get an idea of where the other is coming from, lay out what you do and do not want out of your relationship, what you are and are not satisfied with. As long as both parties are being reasonable about the conversation, I see no reason why it shouldn't work out. Well, unless your husband is a worthless human being, that is.